英语科普文选：Internet(互联网)
<p> <span word="The">The</span> <span word="Internet">Internet</span> <span word="is">is</span> <span word="a">a</span> <span word="giant">giant</span> <span word="network">network</span> <span word="of">of</span> <span word="computers">computers</span> <span word="located">located</span> <span word="all">all</span> <span word="over">over</span> <span word="the">the</span> <span word="world">world</span> <span word="that">that</span> <span word="communicate">communicate</span> <span word="with">with</span> <span word="each">each</span> <span word="other">other</span>.</p><p> <span word="The">The</span> <span word="Internet">Internet</span> <span word="is">is</span> <span word="an">an</span> <span word="international">international</span> <span word="collection">collection</span> <span word="of">of</span> <span word="computer">computer</span> <span word="networks">networks</span>` <span word="that">that</span> <span word="all">all</span> <span word="understand">understand</span> <span word="a">a</span> <span word="standard">standard</span> <span word="system">system</span> <span word="of">of</span> <span word="addresses">addresses</span> <span word="and">and</span> <span word="commands">commands</span>, <span word="connected">connected</span> <span word="together">together</span> <span word="through">through</span> <span word="backbone">backbone</span> <span word="systems">systems</span>. <span word="It">It</span> <span word="was">was</span> <span word="started">started</span> <span word="in">in</span> 1969, <span word="when">when</span> <span word="the">the</span> <span word="U">U</span>.<span word="S">S</span>. <span word="Department">Department</span> <span word="of">of</span> <span word="Defence">Defence</span> <span word="established">established</span> <span word="a">a</span> <span word="nationwide">nationwide</span> <span word="network">network</span> <span word="to">to</span> <span word="connect">connect</span> <span word="a">a</span> <span word="handful">handful</span> <span word="of">of</span> <span word="universities">universities</span> <span word="and">and</span> <span word="contractors">contractors</span>. <span word="The">The</span> <span word="original">original</span> <span word="idea">idea</span> <span word="was">was</span> <span word="to">to</span> <span word="increase">increase</span> <span word="computing">computing</span> <span word="capacity">capacity</span> <span word="that">that</span> <span word="could">could</span> <span word="be">be</span> <span word="shared">shared</span> <span word="by">by</span> <span word="users">users</span> <span word="in">in</span> <span word="many">many</span> <span word="locations">locations</span> <span word="and">and</span> <span word="to">to</span> <span word="find">find</span> <span word="out">out</span> <span word="what">what</span> <span word="it">it</span> <span word="would">would</span> <span word="take">take</span> <span word="for">for</span> <span word="computer">computer</span> <span word="networks">networks</span> <span word="to">to</span> <span word="survive">survive</span> <span word="a">a</span> <span word="nuclear">nuclear</span> <span word="war">war</span> <span word="or">or</span> <span word="other">other</span> <span word="disaster">disaster</span> <span word="by">by</span> <span word="providing">providing</span> <span word="multiple">multiple</span> <span word="path">path</span> <span word="between">between</span> <span word="users">users</span>. <span word="People">People</span> <span word="on">on</span> <span word="the">the</span> <span word="ARPNET">ARPNET</span> (<span word="as">as</span> <span word="this">this</span> <span word="nationwide">nationwide</span> <span word="network">network</span> <span word="was">was</span> <span word="originally">originally</span> <span word="called">called</span>) <span word="quickly">quickly</span> <span word="discovered">discovered</span> <span word="that">that</span> <span word="they">they</span> <span word="could">could</span> <span word="exchange">exchange</span> <span word="messages">messages</span> <span word="and">and</span> <span word="conduct">conduct</span> <span word="electronic">electronic</span> "<span word="conferences">conferences</span>" <span word="with">with</span> <span word="distant">distant</span> <span word="colleagues">colleagues</span> <span word="for">for</span> <span word="purposes">purposes</span> <span word="that">that</span> <span word="had">had</span> <span word="nothing">nothing</span> <span word="to">to</span> <span word="do">do</span> <span word="with">with</span> <span word="the">the</span> <span word="military">military</span> <span word="industrial">industrial</span> <span word="complex">complex</span>. <span word="If">If</span> <span word="somebody">somebody</span> <span word="else">else</span> <span word="had">had</span> <span word="something">something</span> <span word="interesting">interesting</span> <span word="stored">stored</span> <span word="on">on</span> <span word="their">their</span> <span word="computer">computer</span>, <span word="it">it</span> <span word="was">was</span> <span word="a">a</span> <span word="simple">simple</span> <span word="matter">matter</span> <span word="to">to</span> <span word="obtain">obtain</span> <span word="a">a</span> <span word="copy">copy</span> (<span word="assuming">assuming</span> <span word="the">the</span> <span word="owner">owner</span> <span word="did">did</span> <span word="not">not</span> <span word="protect">protect</span> <span word="it">it</span>).</p><p> <span word="Over">Over</span> <span word="the">the</span> <span word="years">years</span>, <span word="additional">additional</span> <span word="networks">networks</span> <span word="joined">joined</span> <span word="which">which</span> <span word="added">added</span> <span word="access">access</span> <span word="to">to</span> <span word="more">more</span> <span word="and">and</span> <span word="more">more</span> <span word="computers">computers</span>. <span word="The">The</span> <span word="first">first</span> <span word="international">international</span> <span word="connections">connections</span>, <span word="to">to</span> <span word="Norway">Norway</span> <span word="and">and</span> <span word="England">England</span>, <span word="were">were</span> <span word="added">added</span> <span word="in">in</span> 1973. <span word="Today">Today</span> <span word="thousands">thousands</span> <span word="of">of</span> <span word="networks">networks</span> <span word="and">and</span> <span word="millions">millions</span> <span word="of">of</span> <span word="computers">computers</span> <span word="are">are</span> <span word="connected">connected</span> <span word="to">to</span> <span word="the">the</span> <span word="Internet">Internet</span>. <span word="It">It</span> <span word="is">is</span> <span word="growing">growing</span> <span word="so">so</span> <span word="quickly">quickly</span> <span word="that">that</span> <span word="nobody">nobody</span> <span word="can">can</span> <span word="say">say</span> <span word="exactly">exactly</span> <span word="how">how</span> <span word="many">many</span> <span word="users">users</span> "<span word="On">On</span> <span word="the">the</span> <span word="Net">Net</span>".</p><p> <span word="The">The</span> <span word="Internet">Internet</span> <span word="is">is</span> <span word="the">the</span> <span word="largest">largest</span> <span word="repository">repository</span> <span word="of">of</span> <span word="information">information</span> <span word="which">which</span> <span word="can">can</span> <span word="provide">provide</span> <span word="very">very</span> <span word="very">very</span> <span word="large">large</span> <span word="network">network</span> <span word="resources">resources</span>. <span word="The">The</span> <span word="network">network</span> <span word="resources">resources</span> <span word="can">can</span> <span word="be">be</span> <span word="divided">divided</span> <span word="into">into</span> <span word="network">network</span> <span word="facilities">facilities</span> <span word="resources">resources</span> <span word="and">and</span> <span word="network">network</span> <span word="information">information</span> <span word="resources">resources</span>. <span word="The">The</span> <span word="network">network</span> <span word="facilities">facilities</span> <span word="resources">resources</span> <span word="provide">provide</span> <span word="us">us</span> <span word="the">the</span> <span word="ability">ability</span> <span word="of">of</span> <span word="remote">remote</span> <span word="computation">computation</span> <span word="and">and</span> <span word="communication">communication</span>. <span word="The">The</span> <span word="network">network</span> <span word="information">information</span> <span word="resources">resources</span> <span word="provides">provides</span> <span word="us">us</span> <span word="all">all</span> <span word="kinds">kinds</span> <span word="of">of</span> <span word="information">information</span> <span word="services">services</span>, <span word="such">such</span> <span word="as">as</span> <span word="science">science</span>, <span word="education">education</span>, <span word="business">business</span>, <span word="history">history</span>, <span word="law">law</span>, <span word="art">art</span>, <span word="and">and</span> <span word="entertainment">entertainment</span>, <span word="etc">etc</span>.</p>
页:
[1]