考研优美英语作文的背诵009
<p> <span word="The">The</span> <span word="modern">modern</span> <span word="age">age</span> <span word="is">is</span> <span word="an">an</span> <span word="age">age</span> <span word="of">of</span> <span word="electricity">electricity</span>. <span word="People">People</span> <span word="are">are</span> <span word="so">so</span> <span word="used">used</span> <span word="to">to</span> <span word="electriclights">electriclights</span>, <span word="radio">radio</span>, <span word="televisions">televisions</span>, <span word="and">and</span> <span word="telephones">telephones</span> <span word="that">that</span> <span word="it">it</span> <span word="is">is</span> <span word="hard">hard</span> <span word="to">to</span> <span word="imagine">imagine</span> <span word="whatlife">whatlife</span> <span word="would">would</span> <span word="be">be</span> <span word="like">like</span> <span word="without">without</span> <span word="them">them</span>. <span word="When">When</span> <span word="there">there</span> <span word="is">is</span> <span word="a">a</span> <span word="power">power</span> <span word="failure">failure</span>, <span word="people">people</span> <span word="gropeabout">gropeabout</span> <span word="in">in</span> <span word="flickering">flickering</span> <span word="candlelight">candlelight</span>, <span word="cars">cars</span> <span word="hesitate">hesitate</span> <span word="in">in</span> <span word="the">the</span> <span word="streets">streets</span> <span word="becausethere">becausethere</span> <span word="are">are</span> <span word="no">no</span> <span word="traffic">traffic</span> <span word="lights">lights</span> <span word="to">to</span> <span word="guide">guide</span> <span word="them">them</span>, <span word="and">and</span> <span word="food">food</span> <span word="spoils">spoils</span> <span word="in">in</span> <span word="silent">silent</span> <span word="refrigerators">refrigerators</span>.</p><p> <span word="Yet">Yet</span>, <span word="peoplebegan">peoplebegan</span> <span word="to">to</span> <span word="understand">understand</span> <span word="how">how</span> <span word="electricity">electricity</span> <span word="works">works</span> <span word="only">only</span> <span word="a">a</span> <span word="little">little</span> <span word="more">more</span> <span word="than">than</span> <span word="two">two</span> <span word="centuriesago">centuriesago</span>. <span word="Nature">Nature</span> <span word="has">has</span> <span word="apparently">apparently</span> <span word="been">been</span> <span word="experimenting">experimenting</span> <span word="in">in</span> <span word="this">this</span> <span word="field">field</span> <span word="for">for</span> <span word="millionsof">millionsof</span> <span word="years">years</span>. <span word="Scientists">Scientists</span> <span word="are">are</span> <span word="discovering">discovering</span> <span word="more">more</span> <span word="and">and</span> <span word="more">more</span> <span word="that">that</span> <span word="the">the</span> <span word="living">living</span> <span word="worldmay">worldmay</span> <span word="hold">hold</span> <span word="many">many</span> <span word="interesting">interesting</span> <span word="secrets">secrets</span> <span word="of">of</span> <span word="electricity">electricity</span> <span word="that">that</span> <span word="could">could</span> <span word="benefit">benefit</span> <span word="humanity">humanity</span>.</p><p> <span word="All">All</span> <span word="livingcells">livingcells</span> <span word="send">send</span> <span word="out">out</span> <span word="tiny">tiny</span> <span word="pulses">pulses</span> <span word="of">of</span> <span word="electricity">electricity</span>. <span word="As">As</span> <span word="the">the</span> <span word="heart">heart</span> <span word="beats">beats</span>, <span word="it">it</span> <span word="sends">sends</span> <span word="outpulses">outpulses</span> <span word="of">of</span> <span word="record">record</span>; <span word="they">they</span> <span word="form">form</span> <span word="an">an</span> <span word="electrocardiogram">electrocardiogram</span>, <span word="which">which</span> <span word="adoctor">adoctor</span> <span word="can">can</span> <span word="study">study</span> <span word="to">to</span> <span word="determine">determine</span> <span word="how">how</span> <span word="well">well</span> <span word="the">the</span> <span word="heart">heart</span> <span word="is">is</span> <span word="working">working</span>. <span word="Thebrain">Thebrain</span>, <span word="too">too</span>, <span word="sends">sends</span> <span word="out">out</span> <span word="brain">brain</span> <span word="waves">waves</span> <span word="of">of</span> <span word="electricity">electricity</span>, <span word="which">which</span> <span word="can">can</span> <span word="be">be</span> <span word="recorded">recorded</span> <span word="inan">inan</span> <span word="electroencephalogram">electroencephalogram</span>. <span word="The">The</span> <span word="electric">electric</span> <span word="currents">currents</span> <span word="generated">generated</span> <span word="bymost">bymost</span> <span word="living">living</span> <span word="cells">cells</span> <span word="are">are</span> <span word="extremely">extremely</span> <span word="small">small</span> -- <span word="often">often</span> <span word="so">so</span> <span word="small">small</span> <span word="that">that</span> <span word="sensitiveinstruments">sensitiveinstruments</span> <span word="are">are</span> <span word="needed">needed</span> <span word="to">to</span> <span word="record">record</span> <span word="them">them</span>. <span word="But">But</span> <span word="in">in</span> <span word="some">some</span> <span word="animals">animals</span>, <span word="certain">certain</span> <span word="musclecells">musclecells</span> <span word="have">have</span> <span word="become">become</span> <span word="so">so</span> <span word="specialized">specialized</span> <span word="as">as</span> <span word="electrical">electrical</span> <span word="generators">generators</span> <span word="that">that</span> <span word="they">they</span> <span word="do">do</span> <span word="not">not</span> <span word="workas">workas</span> <span word="muscle">muscle</span> <span word="cells">cells</span> <span word="at">at</span> <span word="all">all</span>. <span word="When">When</span> <span word="large">large</span> <span word="numbers">numbers</span> <span word="of">of</span> <span word="these">these</span> <span word="cells">cells</span> <span word="are">are</span> <span word="linked">linked</span> <span word="together">together</span>, <span word="the">the</span> <span word="effects">effects</span> <span word="can">can</span> <span word="beastonishing">beastonishing</span>.</p><p> <span word="The">The</span> <span word="electriceel">electriceel</span> <span word="is">is</span> <span word="an">an</span> <span word="amazing">amazing</span> <span word="storage">storage</span> <span word="battery">battery</span>. <span word="It">It</span> <span word="can">can</span> <span word="send">send</span> <span word="a">a</span> <span word="jolt">jolt</span> <span word="of">of</span> <span word="as">as</span> <span word="much">much</span> <span word="as">as</span> <span word="eighthundred">eighthundred</span> <span word="volts">volts</span> <span word="of">of</span> <span word="electricity">electricity</span> <span word="through">through</span> <span word="the">the</span> <span word="water">water</span> <span word="in">in</span> <span word="which">which</span> <span word="it">it</span> <span word="lives">lives</span>. <span word="As">As</span> <span word="many">many</span> <span word="as">as</span> <span word="four">four</span>-<span word="fifths">fifths</span> <span word="of">of</span> <span word="all">all</span> <span word="the">the</span> <span word="cells">cells</span> <span word="in">in</span> <span word="the">the</span> <span word="electric">electric</span> <span word="eels">eels</span> <span word="body">body</span> <span word="are">are</span> <span word="specialized">specialized</span> <span word="for">for</span> <span word="generatingelectricity">generatingelectricity</span>, <span word="and">and</span> <span word="the">the</span> <span word="strength">strength</span> <span word="of">of</span> <span word="the">the</span> <span word="shock">shock</span> <span word="it">it</span> <span word="can">can</span> <span word="delivercorresponds">delivercorresponds</span> <span word="roughly">roughly</span> <span word="to">to</span> <span word="the">the</span> <span word="length">length</span> <span word="of">of</span> <span word="its">its</span> <span word="body">body</span>.</p>
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