六级阅读第13篇
<p> <span word="Our">Our</span> <span word="prophecies">prophecies</span> <span word="need">need</span> <span word="not">not</span> <span word="be">be</span> <span word="completely">completely</span> <span word="wild">wild</span> <span word="guesses">guesses</span>. <span word="We">We</span> <span word="know">know</span> <span word="science">science</span> <span word="has">has</span> <span word="moved">moved</span> <span word="forward">forward</span> <span word="rapidly">rapidly</span> <span word="in">in</span> <span word="the">the</span> <span word="past">past</span> 50 <span word="years">years</span> <span word="and">and</span> <span word="will">will</span> <span word="continue">continue</span> <span word="to">to</span> <span word="do">do</span> <span word="so">so</span>. <span word="If">If</span> <span word="we">we</span> <span word="allow">allow</span> <span word="our">our</span> <span word="imaginations">imaginations</span> <span word="to">to</span> <span word="be">be</span> <span word="guided">guided</span> <span word="by">by</span> <span word="known">known</span> <span word="research">research</span>, <span word="our">our</span> <span word="prophecies">prophecies</span> <span word="need">need</span> <span word="not">not</span> <span word="be">be</span> <span word="sheer">sheer</span> <span word="fantasy">fantasy</span>. <span word="We">We</span> <span word="dont">dont</span> <span word="have">have</span> <span word="to">to</span> <span word="go">go</span> <span word="so">so</span> <span word="far">far</span> <span word="as">as</span> <span word="to">to</span> <span word="predict">predict</span> <span word="that">that</span> <span word="there">there</span> <span word="will">will</span> <span word="be">be</span> <span word="invasion">invasion</span> <span word="by">by</span> <span word="men">men</span> <span word="from">from</span> <span word="Mars">Mars</span>, <span word="or">or</span> <span word="that">that</span> <span word="all">all</span> <span word="food">food</span> <span word="and">and</span> <span word="nourishment">nourishment</span> <span word="will">will</span> <span word="be">be</span> <span word="taken">taken</span> <span word="in">in</span> <span word="capsule">capsule</span> <span word="form">form</span>, <span word="or">or</span> <span word="that">that</span> <span word="mechanical">mechanical</span> <span word="men">men</span> <span word="will">will</span> <span word="roam">roam</span> <span word="the">the</span> <span word="world">world</span>. <span word="With">With</span> <span word="the">the</span> <span word="scientific">scientific</span> <span word="information">information</span> <span word="that">that</span> <span word="we">we</span> <span word="have">have</span> <span word="available">available</span> <span word="now">now</span>, <span word="lets">lets</span> <span word="make">make</span> <span word="an">an</span> <span word="estimate">estimate</span> <span word="of">of</span> <span word="progress">progress</span> <span word="in">in</span> <span word="air">air</span> <span word="travel">travel</span>. <span word="It">It</span> <span word="is">is</span> <span word="likely">likely</span> <span word="that">that</span> <span word="within">within</span> 50 <span word="years">years</span> <span word="we">we</span> <span word="shall">shall</span> <span word="travel">travel</span> <span word="through">through</span> <span word="the">the</span> <span word="air">air</span> <span word="at">at</span> <span word="a">a</span> <span word="speed">speed</span> <span word="of">of</span> 10,000 <span word="miles">miles</span> <span word="per">per</span> <span word="hour">hour</span>. <span word="Too">Too</span> <span word="fast">fast</span>? <span word="Not">Not</span> <span word="at">at</span> <span word="all">all</span>. <span word="Jet">Jet</span>-<span word="propelled">propelled</span> <span word="planes">planes</span> <span word="can">can</span> <span word="now">now</span> <span word="travel">travel</span> <span word="at">at</span> <span word="least">least</span> 1,000 <span word="miles">miles</span> <span word="an">an</span> <span word="hour">hour</span>, <span word="and">and</span> <span word="jet">jet</span> <span word="planes">planes</span> <span word="will">will</span> <span word="be">be</span> <span word="outmoded">outmoded</span> <span word="shortly">shortly</span> <span word="by">by</span> <span word="guided">guided</span> <span word="missiles">missiles</span>. <span word="The">The</span> <span word="X">X</span>-15 <span word="rockets">rockets</span> <span word="speed">speed</span> <span word="in">in</span> 1961 <span word="was">was</span> 3,690 <span word="miles">miles</span> <span word="per">per</span> <span word="hour">hour</span>, <span word="and">and</span> <span word="scientists">scientists</span> <span word="are">are</span> <span word="hoping">hoping</span> <span word="to">to</span> <span word="double">double</span> <span word="and">and</span> <span word="even">even</span> <span word="triple">triple</span> <span word="this">this</span> <span word="speed">speed</span>. <span word="They">They</span> <span word="will">will</span> <span word="accomplish">accomplish</span> <span word="this">this</span> <span word="speed">speed</span>-<span word="up">up</span>, <span word="because">because</span> <span word="there">there</span> <span word="is">is</span> <span word="no">no</span> <span word="apparent">apparent</span> <span word="scientific">scientific</span> <span word="obstacle">obstacle</span> <span word="to">to</span> <span word="prevent">prevent</span> <span word="it">it</span>. <span word="Some">Some</span> <span word="day">day</span>, <span word="certain">certain</span> <span word="aerodynamic">aerodynamic</span> <span word="problems">problems</span> <span word="will">will</span> <span word="be">be</span> <span word="overcome">overcome</span> <span word="and">and</span> <span word="missiles">missiles</span> <span word="will">will</span> <span word="be">be</span> <span word="enlarged">enlarged</span> <span word="to">to</span> <span word="carry">carry</span> <span word="at">at</span> <span word="least">least</span> 25 <span word="passengers">passengers</span>. <span word="When">When</span> <span word="scientists">scientists</span> <span word="have">have</span> <span word="solved">solved</span> <span word="all">all</span> <span word="the">the</span> <span word="problems">problems</span> <span word="of">of</span> <span word="constructing">constructing</span> <span word="and">and</span> <span word="increasing">increasing</span> <span word="the">the</span> <span word="speed">speed</span> <span word="of">of</span> <span word="apparatus">apparatus</span>-<span word="carrying">carrying</span> <span word="missiles">missiles</span>, <span word="their">their</span> <span word="skill">skill</span> <span word="will">will</span> <span word="lead">lead</span> <span word="them">them</span> <span word="to">to</span> <span word="the">the</span> <span word="next">next</span> <span word="stepmissiles">stepmissiles</span> <span word="for">for</span> <span word="interplanetary">interplanetary</span> <span word="flight">flight</span>. <span word="This">This</span> <span word="prediction">prediction</span> <span word="is">is</span> <span word="a">a</span> <span word="scientific">scientific</span> <span word="possibility">possibility</span> <span word="in">in</span> <span word="the">the</span> <span word="near">near</span> <span word="future">future</span>. <span word="Flights">Flights</span> <span word="into">into</span> <span word="outer">outer</span> <span word="space">space</span> <span word="began">began</span> <span word="when">when</span> <span word="Sputnik">Sputnik</span> <span word="I">I</span> <span word="was">was</span> <span word="launched">launched</span> <span word="in">in</span> 1957, <span word="and">and</span> <span word="man">man</span> <span word="first">first</span> <span word="went">went</span> <span word="into">into</span> <span word="space">space</span> <span word="in">in</span> 1961. <span word="During">During</span> <span word="the">the</span> <span word="late">late</span> 1950<span word="s">s</span> <span word="and">and</span> <span word="early">early</span> 1960<span word="s">s</span> <span word="many">many</span> <span word="satellitesman">satellitesman</span>-<span word="made">made</span> <span word="astral">astral</span> <span word="bodiesorbited">bodiesorbited</span> <span word="the">the</span> <span word="earth">earth</span> <span word="and">and</span> <span word="moon">moon</span>. <span word="Satellites">Satellites</span>, <span word="which">which</span> <span word="will">will</span> <span word="be">be</span> <span word="controlled">controlled</span> <span word="by">by</span> <span word="men">men</span> <span word="on">on</span> <span word="earth">earth</span>, <span word="may">may</span> <span word="have">have</span> <span word="many">many</span> <span word="beneficial">beneficial</span> <span word="uses">uses</span>. <span word="Perhaps">Perhaps</span> <span word="scientists">scientists</span> <span word="will">will</span> <span word="discover">discover</span> <span word="a">a</span> <span word="source">source</span> <span word="of">of</span> <span word="energy">energy</span> 100 <span word="miles">miles</span> <span word="above">above</span> <span word="the">the</span> <span word="earth">earth</span>. <span word="This">This</span> <span word="energy">energy</span> <span word="could">could</span> <span word="be">be</span> <span word="transmitted">transmitted</span> <span word="to">to</span> <span word="us">us</span> <span word="as">as</span> <span word="a">a</span> <span word="source">source</span> <span word="of">of</span> <span word="power">power</span> <span word="for">for</span> <span word="manufacturing">manufacturing</span> <span word="plants">plants</span> <span word="or">or</span> <span word="even">even</span> <span word="for">for</span> <span word="our">our</span> <span word="cook">cook</span> <span word="stoves">stoves</span>. <span word="Or">Or</span> <span word="one">one</span> <span word="of">of</span> <span word="these">these</span> <span word="missiles">missiles</span> <span word="might">might</span> <span word="serve">serve</span> <span word="as">as</span> <span word="the">the</span> <span word="medium">medium</span> <span word="for">for</span> <span word="transmitting">transmitting</span> <span word="communications">communications</span> <span word="across">across</span> <span word="the">the</span> <span word="globe">globe</span>. <span word="Telephonic">Telephonic</span> <span word="communications">communications</span> <span word="might">might</span> <span word="be">be</span> <span word="carried">carried</span> <span word="on">on</span> <span word="by">by</span> <span word="beaming">beaming</span> <span word="waves">waves</span> <span word="at">at</span> <span word="the">the</span> <span word="missile">missile</span>, <span word="which">which</span> <span word="would">would</span> <span word="in">in</span> <span word="turn">turn</span> <span word="beam">beam</span> <span word="waves">waves</span> <span word="at">at</span> <span word="a">a</span> <span word="telephone">telephone</span> <span word="halfway">halfway</span> <span word="across">across</span> <span word="the">the</span> <span word="world">world</span>. <span word="The">The</span> <span word="missile">missile</span> <span word="might">might</span> <span word="be">be</span> <span word="the">the</span> <span word="telephonic">telephonic</span> <span word="connection">connection</span>, <span word="for">for</span> <span word="example">example</span>, <span word="between">between</span> <span word="you">you</span> <span word="in">in</span> <span word="New">New</span> <span word="York">York</span>, <span word="and">and</span> <span word="a">a</span> <span word="friend">friend</span> <span word="in">in</span> <span word="Bangkok">Bangkok</span>. <span word="Such">Such</span> <span word="a">a</span> <span word="satellite">satellite</span> <span word="might">might</span> <span word="also">also</span> <span word="be">be</span> <span word="used">used</span> <span word="as">as</span> <span word="the">the</span> <span word="transmitting">transmitting</span> <span word="medium">medium</span> <span word="for">for</span> <span word="interna">interna</span>?<span word="tional">tional</span> <span word="television">television</span> <span word="broadcasts">broadcasts</span>. <span word="Programs">Programs</span> <span word="being">being</span> <span word="telecast">telecast</span> <span word="from">from</span> <span word="a">a</span> <span word="Paris">Paris</span> <span word="studio">studio</span> <span word="could">could</span> <span word="then">then</span> <span word="be">be</span> <span word="seen">seen</span> <span word="simultaneously">simultaneously</span> <span word="in">in</span> <span word="every">every</span> <span word="other">other</span> <span word="country">country</span>. <span word="This">This</span> <span word="immediate">immediate</span> <span word="international">international</span> <span word="transmission">transmission</span> <span word="will">will</span> <span word="surely">surely</span> <span word="be">be</span> <span word="a">a</span> <span word="development">development</span> <span word="before">before</span> <span word="the">the</span> <span word="turn">turn</span> <span word="of">of</span> <span word="a">a</span> <span word="new">new</span> <span word="century">century</span>. <span word="We">We</span> <span word="may">may</span> <span word="expect">expect</span> <span word="to">to</span> <span word="order">order</span> <span word="our">our</span> <span word="clothing">clothing</span>, <span word="groceries">groceries</span>,<span word="and">and</span> <span word="other">other</span> <span word="household">household</span> <span word="goods">goods</span> <span word="by">by</span> <span word="television">television</span>-<span word="phone">phone</span>. <span word="We">We</span> <span word="prophesy">prophesy</span> <span word="that">that</span> <span word="within">within</span> <span word="twenty">twenty</span> <span word="five">five</span> <span word="years">years</span>, <span word="our">our</span> <span word="telephones">telephones</span> <span word="will">will</span> <span word="be">be</span> <span word="equipped">equipped</span> <span word="with">with</span> <span word="television">television</span> <span word="screens">screens</span> <span word="so">so</span> <span word="that">that</span> <span word="we">we</span> <span word="can">can</span> <span word="see">see</span> <span word="the">the</span> <span word="person">person</span> <span word="at">at</span> <span word="the">the</span> <span word="other">other</span> <span word="end">end</span> <span word="of">of</span> <span word="the">the</span> <span word="line">line</span>. <span word="Other">Other</span> <span word="fields">fields</span> <span word="of">of</span> <span word="science">science</span> <span word="have">have</span> <span word="also">also</span> <span word="made">made</span> <span word="gigantic">gigantic</span> <span word="strides">strides</span> <span word="in">in</span> <span word="progress">progress</span>. <span word="Medicine">Medicine</span> <span word="had">had</span> <span word="operated">operated</span> <span word="so">so</span> <span word="efficiently">efficiently</span> <span word="in">in</span> <span word="the">the</span> <span word="past">past</span> <span word="half">half</span>-<span word="century">century</span> <span word="that">that</span> <span word="many">many</span> <span word="diseases">diseases</span> <span word="have">have</span> <span word="been">been</span> <span word="nearly">nearly</span> <span word="wiped">wiped</span> <span word="out">out</span>. <span word="And">And</span> <span word="more">more</span> <span word="will">will</span> <span word="join">join</span> <span word="this">this</span> <span word="disappearing">disappearing</span> <span word="group">group</span> <span word="of">of</span> <span word="diseases">diseases</span>. <span word="Diabetes">Diabetes</span> <span word="and">and</span> <span word="polio">polio</span> <span word="are">are</span> <span word="under">under</span> <span word="control">control</span>. <span word="We">We</span> <span word="can">can</span> <span word="hope">hope</span> <span word="and">and</span> <span word="expect">expect</span> <span word="that">that</span> <span word="cancer">cancer</span> <span word="will">will</span> <span word="be">be</span> <span word="conquered">conquered</span>. <span word="Certain">Certain</span> <span word="skin">skin</span> <span word="diseases">diseases</span>, <span word="like">like</span> <span word="psoriasis">psoriasis</span> <span word="and">and</span> <span word="eczema">eczema</span>, <span word="which">which</span> <span word="are">are</span> <span word="exceedingly">exceedingly</span> <span word="common">common</span> <span word="though">though</span> <span word="not">not</span> <span word="fatal">fatal</span>, <span word="will">will</span> <span word="be">be</span> <span word="eradicated">eradicated</span>. <span word="The">The</span> <span word="victims">victims</span> <span word="of">of</span> <span word="annoying">annoying</span> <span word="diseases">diseases</span> <span word="will">will</span> <span word="lead">lead</span> <span word="pleasanter">pleasanter</span> <span word="lives">lives</span>. <span word="Even">Even</span> <span word="the">the</span> <span word="healthy">healthy</span> <span word="will">will</span> <span word="benefit">benefit</span> <span word="from">from</span> <span word="the">the</span> <span word="advances">advances</span> <span word="in">in</span> <span word="medicine">medicine</span>. <span word="Life">Life</span> <span word="expectancy">expectancy</span> <span word="already">already</span> <span word="had">had</span> <span word="been">been</span> <span word="lengthened">lengthened</span> <span word="and">and</span> <span word="scientists">scientists</span> <span word="know">know</span> <span word="that">that</span> <span word="the">the</span> <span word="time">time</span> <span word="is">is</span> <span word="coining">coining</span> <span word="rapidly">rapidly</span> <span word="when">when</span> <span word="the">the</span> <span word="person">person</span> <span word="one">one</span> <span word="hundred">hundred</span> <span word="years">years</span> <span word="old">old</span> <span word="will">will</span> <span word="not">not</span> <span word="be">be</span> <span word="a">a</span> <span word="phenomenon">phenomenon</span>. <span word="Even">Even</span> <span word="if">if</span> <span word="the">the</span> <span word="birth">birth</span> <span word="rate">rate</span> <span word="should">should</span> <span word="remain">remain</span> <span word="at">at</span> <span word="its">its</span> <span word="present">present</span> <span word="level">level</span>, <span word="the">the</span> <span word="population">population</span> <span word="will">will</span> <span word="be">be</span> <span word="larger">larger</span> <span word="as">as</span> <span word="people">people</span> <span word="stay">stay</span> <span word="alive">alive</span> <span word="longer">longer</span>. <span word="Realizing">Realizing</span> <span word="that">that</span> <span word="the">the</span> <span word="increase">increase</span> <span word="of">of</span> <span word="population">population</span> <span word="will">will</span> <span word="Strain">Strain</span> <span word="natural">natural</span> <span word="resources">resources</span>, <span word="scientists">scientists</span> <span word="of">of</span> <span word="all">all</span> <span word="kinds">kinds</span> <span word="are">are</span> <span word="experimenting">experimenting</span> <span word="with">with</span> <span word="methods">methods</span> <span word="for">for</span> <span word="extending">extending</span> <span word="these">these</span> <span word="resources">resources</span>. <span word="One">One</span> <span word="matter">matter</span> <span word="of">of</span> <span word="immediate">immediate</span> <span word="urgency">urgency</span> <span word="will">will</span> <span word="be">be</span> <span word="our">our</span> <span word="source">source</span> <span word="of">of</span> <span word="food">food</span>. <span word="The">The</span> <span word="larger">larger</span> <span word="the">the</span> <span word="population">population</span>, <span word="the">the</span> <span word="greater">greater</span> <span word="will">will</span> <span word="be">be</span> <span word="the">the</span> <span word="demand">demand</span> <span word="for">for</span> <span word="food">food</span>. <span word="Our">Our</span> <span word="arable">arable</span>适合工作的) <span word="land">land</span> <span word="is">is</span> <span word="already">already</span> <span word="taxed">taxed</span> <span word="to">to</span> <span word="capacity">capacity</span>. <span word="Scientists">Scientists</span> <span word="will">will</span> <span word="have">have</span> <span word="to">to</span> <span word="find">find</span> <span word="a">a</span> <span word="way">way</span> <span word="to">to</span> <span word="mass">mass</span>-<span word="produce">produce</span> <span word="food">food</span> <span word="by">by</span> <span word="hydroponicsthe">hydroponicsthe</span> <span word="science">science</span> <span word="of">of</span> <span word="growing">growing</span> <span word="vegetables">vegetables</span>, <span word="or">or</span> <span word="other">other</span> <span word="plants">plants</span>, <span word="in">in</span> <span word="wateror">wateror</span> <span word="by">by</span> <span word="irrigating">irrigating</span> <span word="desert">desert</span> <span word="wasteland">wasteland</span>. <span word="This">This</span> <span word="increased">increased</span> <span word="demand">demand</span> <span word="for">for</span> <span word="food">food</span> <span word="will">will</span> <span word="create">create</span> <span word="an">an</span> <span word="increased">increased</span> <span word="demand">demand</span> <span word="for">for</span> <span word="water">water</span>. <span word="Certain">Certain</span> <span word="parts">parts</span> <span word="of">of</span> <span word="the">the</span> <span word="United">United</span> <span word="StatesNevada">StatesNevada</span>, <span word="New">New</span> <span word="Mexico">Mexico</span>, <span word="and">and</span> <span word="Arizona">Arizona</span>, <span word="for">for</span> <span word="examplehave">examplehave</span> <span word="been">been</span> <span word="in">in</span> <span word="desperate">desperate</span> <span word="need">need</span> <span word="of">of</span> <span word="water">water</span> <span word="for">for</span> <span word="a">a</span> <span word="long">long</span> <span word="time">time</span>. <span word="Periodically">Periodically</span>, <span word="the">the</span> <span word="citizens">citizens</span> <span word="of">of</span> <span word="New">New</span> <span word="York">York</span> <span word="have">have</span> <span word="been">been</span> <span word="water">water</span>-<span word="rationed">rationed</span> <span word="because">because</span> <span word="droughts">droughts</span> <span word="have">have</span> <span word="seriously">seriously</span> <span word="threatened">threatened</span> <span word="the">the</span> <span word="water">water</span> <span word="supply">supply</span> <span word="in">in</span> <span word="the">the</span> <span word="reservoirs">reservoirs</span> <span word="which">which</span> <span word="provide">provide</span> <span word="the">the</span> <span word="millions">millions</span> <span word="of">of</span> <span word="gallons">gallons</span> <span word="a">a</span> <span word="day">day</span> <span word="needed">needed</span> <span word="in">in</span> <span word="the">the</span> <span word="largest">largest</span> <span word="city">city</span> <span word="in">in</span> <span word="the">the</span> <span word="world">world</span>. <span word="Scientists">Scientists</span> <span word="will">will</span> <span word="solve">solve</span> <span word="the">the</span> <span word="water">water</span> <span word="problems">problems</span> <span word="of">of</span> <span word="the">the</span> <span word="desert">desert</span> <span word="and">and</span> <span word="metropolitan">metropolitan</span> <span word="areas">areas</span>. <span word="Rain">Rain</span>-<span word="makers">makers</span> <span word="will">will</span> <span word="have">have</span> <span word="perfected">perfected</span> <span word="a">a</span> <span word="simple">simple</span> <span word="method">method</span>, <span word="now">now</span> <span word="in">in</span> <span word="the">the</span> <span word="elementary">elementary</span> <span word="stages">stages</span> <span word="of">of</span> <span word="experimentation">experimentation</span>, <span word="for">for</span> <span word="making">making</span> <span word="clouds">clouds</span> <span word="release">release</span> <span word="their">their</span> <span word="moisture">moisture</span> <span word="so">so</span> <span word="that">that</span> <span word="the">the</span> <span word="right">right</span> <span word="amount">amount</span> <span word="of">of</span> <span word="rain">rain</span> <span word="is">is</span> <span word="produced">produced</span> <span word="to">to</span> <span word="keep">keep</span> <span word="reservoirs">reservoirs</span> <span word="at">at</span> <span word="the">the</span> <span word="correct">correct</span> <span word="level">level</span> <span word="at">at</span> <span word="all">all</span> <span word="times">times</span> <span word="of">of</span> <span word="the">the</span> <span word="year">year</span>. <span word="Another">Another</span> <span word="method">method</span> <span word="of">of</span> <span word="water">water</span> <span word="production">production</span> <span word="will">will</span> <span word="be">be</span> <span word="the">the</span> <span word="purification">purification</span> <span word="of">of</span> <span word="salt">salt</span> <span word="water">water</span> <span word="taken">taken</span> <span word="from">from</span> <span word="oceans">oceans</span>. <span word="When">When</span> <span word="a">a</span> <span word="simple">simple</span>, <span word="cheap">cheap</span> <span word="method">method</span> <span word="has">has</span> <span word="been">been</span> <span word="worked">worked</span> <span word="out">out</span> <span word="for">for</span> <span word="converting">converting</span> <span word="seawater">seawater</span> <span word="into">into</span> <span word="pure">pure</span> <span word="water">water</span> <span word="suitable">suitable</span> <span word="for">for</span> <span word="use">use</span> <span word="in">in</span> <span word="the">the</span> <span word="household">household</span> <span word="and">and</span> <span word="the">the</span> <span word="manufacturing">manufacturing</span> <span word="plant">plant</span>, <span word="other">other</span> <span word="scientist">scientist</span>-<span word="engineers">engineers</span> <span word="will">will</span> <span word="contribute">contribute</span> <span word="practical">practical</span> <span word="mechanical">mechanical</span> <span word="equipment">equipment</span> <span word="for">for</span> <span word="piping">piping</span> <span word="the">the</span> <span word="water">water</span> <span word="from">from</span> <span word="seashore">seashore</span> <span word="to">to</span> <span word="desert">desert</span> <span word="areas">areas</span>. <span word="Other">Other</span> <span word="improvements">improvements</span> <span word="of">of</span> <span word="the">the</span> <span word="future">future</span> <span word="will">will</span> <span word="touch">touch</span> <span word="our">our</span> <span word="lives">lives</span> <span word="more">more</span> <span word="closely">closely</span>. <span word="It">It</span> <span word="is">is</span> <span word="possible">possible</span>, <span word="for">for</span> <span word="example">example</span>, <span word="to">to</span> <span word="imagine">imagine</span> <span word="that">that</span> <span word="cities">cities</span> <span word="of">of</span> <span word="the">the</span> <span word="future">future</span> <span word="will">will</span> <span word="have">have</span> <span word="underground">underground</span> <span word="networks">networks</span> <span word="of">of</span> <span word="conveyor">conveyor</span> <span word="belts">belts</span> <span word="which">which</span> <span word="would">would</span> <span word="supplement">supplement</span> <span word="subways">subways</span> <span word="and">and</span> <span word="make">make</span> <span word="it">it</span> <span word="possible">possible</span> <span word="for">for</span> <span word="people">people</span> <span word="to">to</span> <span word="hop">hop</span> <span word="on">on</span> <span word="a">a</span> <span word="rapid">rapid</span> <span word="conveyor">conveyor</span> <span word="system">system</span>, <span word="sit">sit</span> <span word="in">in</span> <span word="a">a</span> <span word="little">little</span> <span word="booth">booth</span>, <span word="and">and</span> <span word="shuttle">shuttle</span> <span word="a">a</span> <span word="couple">couple</span> <span word="of">of</span> <span word="blocks">blocks</span> <span word="in">in</span> <span word="safety">safety</span>. <span word="Of">Of</span> <span word="even">even</span> <span word="more">more</span> <span word="immediate">immediate</span> <span word="interest">interest</span> <span word="than">than</span> <span word="transportation">transportation</span> <span word="is">is</span> <span word="the">the</span> <span word="clothing">clothing</span> <span word="of">of</span> <span word="the">the</span> <span word="future">future</span>. <span word="The">The</span> <span word="clothes">clothes</span> <span word="you">you</span> <span word="will">will</span> <span word="wear">wear</span> <span word="at">at</span> <span word="the">the</span> <span word="end">end</span> <span word="of">of</span> <span word="this">this</span> <span word="century">century</span> <span word="may">may</span> <span word="not">not</span> <span word="be">be</span> <span word="of">of</span> <span word="silk">silk</span>, <span word="cotton">cotton</span>, <span word="wool">wool</span>, <span word="or">or</span> <span word="even">even</span> <span word="nylon">nylon</span>. <span word="Clothing">Clothing</span> <span word="will">will</span> <span word="be">be</span> <span word="made">made</span> <span word="of">of</span> <span word="new">new</span> <span word="synthetics">synthetics</span> <span word="and">and</span> <span word="so">so</span> <span word="will">will</span> <span word="the">the</span> <span word="upholstery">upholstery</span> <span word="materials">materials</span> <span word="you">you</span> <span word="order">order</span> <span word="by">by</span> <span word="television">television</span>-<span word="phone">phone</span>. <span word="To">To</span> <span word="get">get</span> <span word="these">these</span> <span word="synthetic">synthetic</span> <span word="materials">materials</span>, <span word="scientists">scientists</span> <span word="will">will</span> <span word="have">have</span> <span word="devised">devised</span> <span word="some">some</span> <span word="electrically">electrically</span> <span word="controlled">controlled</span> <span word="apparatus">apparatus</span> <span word="which">which</span> <span word="will">will</span> <span word="allow">allow</span> <span word="men">men</span> <span word="to">to</span> <span word="dig">dig</span> <span word="twenty">twenty</span> <span word="miles">miles</span> <span word="below">below</span> <span word="the">the</span> <span word="surface">surface</span> <span word="of">of</span> <span word="the">the</span> <span word="ground">ground</span>. <span word="At">At</span> <span word="that">that</span> <span word="level">level</span> <span word="inside">inside</span> <span word="the">the</span> <span word="earth">earth</span>, <span word="they">they</span> <span word="may">may</span> <span word="discover">discover</span> <span word="many">many</span> <span word="types">types</span> <span word="of">of</span> <span word="rock">rock</span>, <span word="now">now</span> <span word="unknown">unknown</span>, <span word="which">which</span> <span word="will">will</span> <span word="give">give</span> <span word="us">us</span> <span word="these">these</span> <span word="new">new</span> <span word="synthetic">synthetic</span> <span word="materials">materials</span>. <span word="Cloth">Cloth</span> <span word="made">made</span> <span word="from">from</span> <span word="these">these</span> <span word="materials">materials</span> <span word="will">will</span> <span word="be">be</span> <span word="fire">fire</span>-<span word="proof">proof</span> <span word="because">because</span> <span word="they">they</span> <span word="come">come</span> <span word="from">from</span> <span word="rock">rock</span>. <span word="While">While</span> <span word="these">these</span> <span word="synthetics">synthetics</span> <span word="for">for</span> <span word="cloth">cloth</span> <span word="are">are</span> <span word="being">being</span> <span word="developed">developed</span>, <span word="others">others</span> <span word="will">will</span> <span word="be">be</span> <span word="discovered">discovered</span> <span word="to">to</span> <span word="take">take</span> <span word="the">the</span> <span word="place">place</span> <span word="of">of</span> <span word="wood">wood</span> <span word="and">and</span> <span word="steel">steel</span>. <span word="We">We</span> <span word="already">already</span> <span word="have">have</span> <span word="plastic">plastic</span> <span word="furniture">furniture</span>, <span word="plastic">plastic</span> <span word="boats">boats</span>, <span word="and">and</span> <span word="plastic">plastic</span> <span word="dishes">dishes</span>. <span word="As">As</span> <span word="our">our</span> <span word="wood">wood</span> <span word="and">and</span> <span word="steel">steel</span> <span word="supplies">supplies</span> <span word="dwindle">dwindle</span> ， <span word="synthetic">synthetic</span> <span word="materials">materials</span> <span word="will">will</span> <span word="be">be</span> <span word="developed">developed</span> <span word="for">for</span> <span word="building">building</span> <span word="homes">homes</span> <span word="and">and</span> <span word="giant">giant</span> <span word="skyscrapers">skyscrapers</span>.</p>
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