英语阅读强化训练：Genomeisabook
<p> <span word="Imagine">Imagine</span> <span word="that">that</span> <span word="the">the</span> <span word="genome">genome</span> （基因组） <span word="is">is</span> <span word="a">a</span> <span word="book">book</span>. <span word="The">The</span> <span word="book">book</span> <span word="consists">consists</span> <span word="of">of</span> 23 <span word="chapters">chapters</span> <span word="with">with</span> <span word="thousands">thousands</span> <span word="of">of</span> <span word="stories">stories</span> <span word="made">made</span> <span word="up">up</span> <span word="of">of</span> <span word="paragraphs">paragraphs</span>, <span word="words">words</span> <span word="and">and</span> <span word="letters">letters</span> <span word="on">on</span> <span word="different">different</span> <span word="levels">levels</span>. <span word="There">There</span> <span word="are">are</span> <span word="one">one</span> <span word="billion">billion</span> <span word="words">words</span> <span word="in">in</span> <span word="the">the</span> <span word="book">book</span>, <span word="as">as</span> <span word="long">long</span> <span word="as">as</span> 800 <span word="Bibles">Bibles</span>; <span word="if">if</span> <span word="I">I</span> <span word="read">read</span> <span word="the">the</span> <span word="genome">genome</span> <span word="out">out</span> <span word="to">to</span> <span word="you">you</span> <span word="at">at</span> <span word="the">the</span> <span word="rate">rate</span> <span word="of">of</span> <span word="one">one</span> <span word="word">word</span> <span word="per">per</span> <span word="second">second</span> <span word="for">for</span> <span word="eight">eight</span> <span word="hours">hours</span> <span word="a">a</span> <span word="day">day</span>, <span word="it">it</span> <span word="would">would</span> <span word="take">take</span> <span word="me">me</span> <span word="centuries">centuries</span>; <span word="if">if</span> <span word="I">I</span> <span word="wrote">wrote</span> <span word="out">out</span> <span word="the">the</span> <span word="human">human</span> <span word="genome">genome</span>, <span word="one">one</span> <span word="letter">letter</span> <span word="per">per</span> <span word="millimeter">millimeter</span>, <span word="my">my</span> <span word="text">text</span> <span word="would">would</span> <span word="be">be</span> <span word="as">as</span> <span word="long">long</span> <span word="as">as</span> <span word="the">the</span> <span word="River">River</span> <span word="Danube">Danube</span>. <span word="This">This</span> <span word="is">is</span> <span word="a">a</span> <span word="huge">huge</span> <span word="volume">volume</span>, <span word="a">a</span> <span word="book">book</span> <span word="of">of</span> <span word="great">great</span> <span word="length">length</span>, <span word="but">but</span> <span word="it">it</span> <span word="all">all</span> <span word="fits">fits</span> <span word="inside">inside</span> <span word="an">an</span> <span word="extremely">extremely</span> <span word="small">small</span> <span word="cell">cell</span> <span word="nuclear">nuclear</span>（细胞核） <span word="that">that</span> <span word="fits">fits</span> <span word="easily">easily</span> <span word="upon">upon</span> <span word="the">the</span> <span word="head">head</span> <span word="of">of</span> <span word="a">a</span> <span word="pin">pin</span>.</p><p> <span word="The">The</span> <span word="idea">idea</span> <span word="of">of</span> <span word="the">the</span> <span word="genome">genome</span> <span word="as">as</span> <span word="a">a</span> <span word="book">book</span> <span word="is">is</span> <span word="not">not</span>, <span word="strictly">strictly</span> <span word="speaking">speaking</span>, <span word="even">even</span> <span word="a">a</span> <span word="metaphor">metaphor</span>. <span word="It">It</span> <span word="is">is</span> <span word="true">true</span> <span word="to">to</span> <span word="a">a</span> <span word="great">great</span> <span word="extent">extent</span>. <span word="A">A</span> <span word="book">book</span> <span word="is">is</span> <span word="a">a</span> <span word="piece">piece</span> <span word="of">of</span> <span word="digital">digital</span> <span word="information">information</span>, <span word="written">written</span> <span word="in">in</span> <span word="one">one</span>-<span word="directional">directional</span> <span word="form">form</span> <span word="and">and</span> <span word="defined">defined</span> <span word="by">by</span> <span word="a">a</span> <span word="code">code</span> <span word="that">that</span> <span word="translates">translates</span> <span word="a">a</span> <span word="small">small</span> <span word="alphabet">alphabet</span> <span word="of">of</span> <span word="signs">signs</span> <span word="into">into</span> <span word="a">a</span> <span word="large">large</span> <span word="dictionary">dictionary</span> <span word="of">of</span> <span word="meanings">meanings</span> <span word="through">through</span> <span word="the">the</span> <span word="order">order</span> <span word="of">of</span> <span word="their">their</span> <span word="groupings">groupings</span>. <span word="So">So</span> <span word="is">is</span> <span word="a">a</span> <span word="genome">genome</span>. <span word="The">The</span> <span word="only">only</span> <span word="difference">difference</span> <span word="is">is</span> <span word="that">that</span> <span word="all">all</span> <span word="English">English</span> <span word="books">books</span> <span word="read">read</span> <span word="from">from</span> <span word="left">left</span> <span word="to">to</span> <span word="right">right</span>, <span word="while">while</span> <span word="some">some</span> <span word="parts">parts</span> <span word="of">of</span> <span word="the">the</span> <span word="genome">genome</span> <span word="read">read</span> <span word="from">from</span> <span word="left">left</span> <span word="to">to</span> <span word="right">right</span> <span word="while">while</span> <span word="some">some</span> <span word="from">from</span> <span word="right">right</span> <span word="to">to</span> <span word="left">left</span>, <span word="but">but</span> <span word="never">never</span> <span word="both">both</span> <span word="at">at</span> <span word="the">the</span> <span word="same">same</span> <span word="time">time</span>.</p><p> <span word="While">While</span> <span word="English">English</span> <span word="books">books</span> <span word="are">are</span> <span word="written">written</span> <span word="in">in</span> <span word="words">words</span> <span word="of">of</span> <span word="different">different</span> <span word="lengthens">lengthens</span> <span word="using">using</span> <span word="twenty">twenty</span>-<span word="six">six</span> <span word="letters">letters</span>, <span word="genomes">genomes</span> <span word="are">are</span> <span word="written">written</span> <span word="entirely">entirely</span> <span word="in">in</span> <span word="words">words</span> <span word="of">of</span> <span word="three">three</span>-<span word="letter">letter</span> <span word="length">length</span>, <span word="using">using</span> <span word="only">only</span> <span word="four">four</span> <span word="letters">letters</span>, <span word="and">and</span> <span word="instead">instead</span> <span word="of">of</span> <span word="being">being</span> <span word="written">written</span> <span word="on">on</span> <span word="flat">flat</span> <span word="pages">pages</span>, <span word="they">they</span> <span word="are">are</span> <span word="written">written</span> <span word="on">on</span> <span word="long">long</span> <span word="chains">chains</span> <span word="of">of</span> <span word="DNA">DNA</span> <span word="molecules">molecules</span> （分子）.</p><p> <span word="The">The</span> <span word="genome">genome</span> <span word="is">is</span> <span word="a">a</span> <span word="very">very</span> <span word="clever">clever</span> <span word="book">book</span>, <span word="because">because</span> <span word="in">in</span> <span word="the">the</span> <span word="right">right</span> <span word="condition">condition</span> <span word="it">it</span> <span word="can">can</span> <span word="both">both</span> <span word="photocopy">photocopy</span> <span word="itself">itself</span> <span word="and">and</span> <span word="read">read</span> <span word="itself">itself</span>.</p>
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