考研英语阅读六：机器人自我复制不再是梦
<p> <span word="Scientists">Scientists</span> <span word="at">at</span> <span word="the">the</span> <span word="Cornell">Cornell</span> <span word="University">University</span> <span word="in">in</span> <span word="Ithaca">Ithaca</span>, <span word="New">New</span> <span word="York">York</span> <span word="have">have</span> <span word="created">created</span> <span word="small">small</span> <span word="robots">robots</span> <span word="that">that</span> <span word="can">can</span> <span word="build">build</span> <span word="copies">copies</span> <span word="of">of</span> <span word="themselves">themselves</span>. <span word="Self">Self</span>-<span word="replicating">replicating</span> <span word="robots">robots</span> <span word="are">are</span> <span word="no">no</span> <span word="longer">longer</span> <span word="the">the</span> <span word="stuff">stuff</span> <span word="of">of</span> <span word="science">science</span> <span word="fiction">fiction</span>.</p><p> <span word="Each">Each</span> <span word="robot">robot</span> <span word="consists">consists</span> <span word="of">of</span> <span word="several">several</span> 10 <span word="cm">cm</span> <span word="cubes">cubes</span> <span word="which">which</span> <span word="have">have</span> <span word="identical">identical</span> <span word="machinery">machinery</span>, <span word="electromagnets">electromagnets</span> <span word="to">to</span> <span word="attach">attach</span> <span word="and">and</span> <span word="detach">detach</span> <span word="to">to</span> <span word="each">each</span> <span word="other">other</span> <span word="and">and</span> <span word="a">a</span> <span word="computer">computer</span> <span word="program">program</span> <span word="for">for</span> <span word="replication">replication</span>. <span word="The">The</span> <span word="robots">robots</span> <span word="can">can</span> <span word="bend">bend</span> <span word="and">and</span> <span word="pick">pick</span> <span word="up">up</span> <span word="and">and</span> <span word="stack">stack</span> <span word="the">the</span> <span word="cubes">cubes</span>.</p><p> <span word="Although">Although</span> <span word="the">the</span> <span word="machines">machines</span> <span word="we">we</span> <span word="have">have</span> <span word="created">created</span> <span word="are">are</span> <span word="still">still</span> <span word="simple">simple</span> <span word="compared">compared</span> <span word="with">with</span> <span word="biological">biological</span> <span word="self">self</span>-<span word="reproduction">reproduction</span>, <span word="they">they</span> <span word="demonstrate">demonstrate</span> <span word="that">that</span> <span word="mechanical">mechanical</span> <span word="self">self</span>-<span word="reproduction">reproduction</span> <span word="is">is</span> <span word="possible">possible</span> <span word="and">and</span> <span word="not">not</span> <span word="unique">unique</span> <span word="to">to</span> <span word="biology">biology</span>, <span word="Hod">Hod</span> <span word="Lipson">Lipson</span> <span word="said">said</span> <span word="in">in</span> <span word="a">a</span> <span word="report">report</span> <span word="in">in</span> <span word="the">the</span> <span word="science">science</span> <span word="journal">journal</span> <span word="Nature">Nature</span> <span word="on">on</span> <span word="Wednesday">Wednesday</span>.</p><p> <span word="He">He</span> <span word="and">and</span> <span word="his">his</span> <span word="team">team</span> <span word="believe">believe</span> <span word="the">the</span> <span word="design">design</span> <span word="principle">principle</span> <span word="could">could</span> <span word="be">be</span> <span word="used">used</span> <span word="to">to</span> <span word="make">make</span> <span word="long">long</span> <span word="term">term</span>, <span word="self">self</span>-<span word="repairing">repairing</span> <span word="robots">robots</span> <span word="that">that</span> <span word="could">could</span> <span word="mend">mend</span> <span word="themselves">themselves</span> <span word="and">and</span> <span word="be">be</span> <span word="used">used</span> <span word="in">in</span> <span word="hazardous">hazardous</span> <span word="Scientists">Scientists</span> <span word="at">at</span> <span word="the">the</span> <span word="Cornell">Cornell</span> <span word="University">University</span> <span word="in">in</span> <span word="Ithaca">Ithaca</span>, <span word="New">New</span> <span word="York">York</span> <span word="have">have</span> <span word="created">created</span> <span word="small">small</span> <span word="robots">robots</span> <span word="that">that</span> <span word="can">can</span> <span word="build">build</span> <span word="copies">copies</span> <span word="of">of</span> <span word="themselves">themselves</span>. <span word="Self">Self</span>-<span word="replicating">replicating</span> <span word="robots">robots</span> <span word="are">are</span> <span word="no">no</span> <span word="longer">longer</span> <span word="the">the</span> <span word="stuff">stuff</span> <span word="of">of</span> <span word="science">science</span> <span word="fiction">fiction</span>.</p><p> <span word="The">The</span> <span word="experimental">experimental</span> <span word="robots">robots</span>, <span word="which">which</span> <span word="dont">dont</span> <span word="do">do</span> <span word="anything">anything</span> <span word="else">else</span> <span word="except">except</span> <span word="make">make</span> <span word="copies">copies</span> <span word="of">of</span> <span word="themselves">themselves</span>, <span word="are">are</span> <span word="powered">powered</span> <span word="through">through</span> <span word="contacts">contacts</span> <span word="on">on</span> <span word="the">the</span> <span word="surface">surface</span> <span word="of">of</span> <span word="the">the</span> <span word="table">table</span> <span word="and">and</span> <span word="transfer">transfer</span> <span word="data">data</span> <span word="through">through</span> <span word="their">their</span> <span word="faces">faces</span>. <span word="They">They</span> <span word="self">self</span>-<span word="replicate">replicate</span> <span word="by">by</span> <span word="using">using</span> <span word="additional">additional</span> <span word="modules">modules</span> <span word="placed">placed</span> <span word="in">in</span> <span word="special">special</span> <span word="feeding">feeding</span> <span word="locations">locations</span>.</p><p> <span word="The">The</span> <span word="machines">machines</span> <span word="duplicate">duplicate</span> <span word="themselves">themselves</span> <span word="by">by</span> <span word="bending">bending</span> <span word="over">over</span> <span word="and">and</span> <span word="putting">putting</span> <span word="their">their</span> <span word="top">top</span> <span word="cube">cube</span> <span word="on">on</span> <span word="the">the</span> <span word="table">table</span>. <span word="Then">Then</span> <span word="they">they</span> <span word="bend">bend</span> <span word="again">again</span>, <span word="pick">pick</span> <span word="up">up</span> <span word="another">another</span> <span word="cube">cube</span>, <span word="put">put</span> <span word="it">it</span> <span word="on">on</span> <span word="top">top</span> <span word="of">of</span> <span word="the">the</span> <span word="first">first</span> <span word="and">and</span> <span word="repeat">repeat</span> <span word="the">the</span> <span word="entire">entire</span> <span word="process">process</span>. <span word="As">As</span> <span word="the">the</span> <span word="new">new</span> <span word="robot">robot</span> <span word="begins">begins</span> <span word="to">to</span> <span word="take">take</span> <span word="shape">shape</span> <span word="it">it</span> <span word="helps">helps</span> <span word="to">to</span> <span word="build">build</span> <span word="itself">itself</span>.</p>
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