考研优美英语作文的背诵027
<p> <span word="In">In</span> <span word="science">science</span>, <span word="a">a</span> <span word="theory">theory</span> <span word="is">is</span> <span word="a">a</span> <span word="reasonable">reasonable</span> <span word="explanation">explanation</span> <span word="of">of</span> <span word="observed">observed</span> <span word="events">events</span> <span word="that">that</span> <span word="are">are</span> <span word="related">related</span>. <span word="A">A</span> <span word="theory">theory</span> <span word="often">often</span> <span word="involves">involves</span> <span word="an">an</span> <span word="imaginary">imaginary</span> <span word="model">model</span> <span word="that">that</span> <span word="helps">helps</span> <span word="scientists">scientists</span> <span word="picture">picture</span> <span word="the">the</span> <span word="way">way</span> <span word="an">an</span> <span word="observed">observed</span> <span word="event">event</span> <span word="could">could</span> <span word="be">be</span> <span word="produced">produced</span>. <span word="A">A</span> <span word="good">good</span> <span word="example">example</span> <span word="of">of</span> <span word="this">this</span> <span word="is">is</span> <span word="found">found</span> <span word="in">in</span> <span word="the">the</span> <span word="kinetic">kinetic</span> <span word="molecular">molecular</span> <span word="theory">theory</span>, <span word="in">in</span> <span word="which">which</span> <span word="gases">gases</span> <span word="are">are</span> <span word="pictured">pictured</span> <span word="as">as</span> <span word="being">being</span> <span word="made">made</span> <span word="up">up</span> <span word="of">of</span> <span word="many">many</span> <span word="small">small</span> <span word="particles">particles</span> <span word="that">that</span> <span word="are">are</span> <span word="in">in</span> <span word="constant">constant</span> <span word="motion">motion</span>.</p><p> <span word="A">A</span> <span word="useful">useful</span> <span word="theory">theory</span>, <span word="in">in</span> <span word="addition">addition</span> <span word="to">to</span> <span word="explaining">explaining</span> <span word="past">past</span> <span word="observations">observations</span>, <span word="helps">helps</span> <span word="to">to</span> <span word="predict">predict</span> <span word="events">events</span> <span word="that">that</span> <span word="have">have</span> <span word="not">not</span> <span word="as">as</span> <span word="yet">yet</span> <span word="been">been</span> <span word="observed">observed</span>. <span word="After">After</span> <span word="a">a</span> <span word="theory">theory</span> <span word="has">has</span> <span word="been">been</span> <span word="publicized">publicized</span>, <span word="scientists">scientists</span> <span word="design">design</span> <span word="experiments">experiments</span> <span word="to">to</span> <span word="test">test</span> <span word="the">the</span> <span word="theory">theory</span>. <span word="If">If</span> <span word="observations">observations</span> <span word="confirm">confirm</span> <span word="the">the</span> <span word="scientists">scientists</span> <span word="predictions">predictions</span>, <span word="the">the</span> <span word="theory">theory</span> <span word="is">is</span> <span word="supported">supported</span>. <span word="If">If</span> <span word="observations">observations</span> <span word="do">do</span> <span word="not">not</span> <span word="confirm">confirm</span> <span word="the">the</span> <span word="predictions">predictions</span>, <span word="the">the</span> <span word="scientists">scientists</span> <span word="must">must</span> <span word="search">search</span> <span word="further">further</span>. <span word="There">There</span> <span word="may">may</span> <span word="be">be</span> <span word="a">a</span> <span word="fault">fault</span> <span word="in">in</span> <span word="the">the</span> <span word="experiment">experiment</span>, <span word="or">or</span> <span word="the">the</span> <span word="theory">theory</span> <span word="may">may</span> <span word="have">have</span> <span word="to">to</span> <span word="be">be</span> <span word="revised">revised</span> <span word="or">or</span> <span word="rejected">rejected</span>.</p><p> <span word="Science">Science</span> <span word="involves">involves</span> <span word="imagination">imagination</span> <span word="and">and</span> <span word="creative">creative</span> <span word="thinking">thinking</span> <span word="as">as</span> <span word="well">well</span> <span word="as">as</span> <span word="collecting">collecting</span> <span word="information">information</span> <span word="and">and</span> <span word="performing">performing</span> <span word="experiments">experiments</span>. <span word="Facts">Facts</span> <span word="by">by</span> <span word="themselves">themselves</span> <span word="are">are</span> <span word="not">not</span> <span word="science">science</span>. <span word="As">As</span> <span word="the">the</span> <span word="mathematician">mathematician</span> <span word="Jules">Jules</span> <span word="Henri">Henri</span> <span word="Poincare">Poincare</span> <span word="said">said</span>,<span word="Science">Science</span> <span word="is">is</span> <span word="built">built</span> <span word="with">with</span> <span word="facts">facts</span> <span word="just">just</span> <span word="as">as</span> <span word="a">a</span> <span word="house">house</span> <span word="is">is</span> <span word="built">built</span> <span word="with">with</span> <span word="bricks">bricks</span>, <span word="but">but</span> <span word="a">a</span> <span word="collection">collection</span> <span word="of">of</span> <span word="facts">facts</span> <span word="cannot">cannot</span> <span word="be">be</span> <span word="called">called</span> <span word="science">science</span> <span word="any">any</span> <span word="more">more</span> <span word="than">than</span> <span word="a">a</span> <span word="pile">pile</span> <span word="of">of</span> <span word="bricks">bricks</span> <span word="can">can</span> <span word="be">be</span> <span word="called">called</span> <span word="a">a</span> <span word="house">house</span>. <span word="Most">Most</span> <span word="scientists">scientists</span> <span word="start">start</span> <span word="an">an</span> <span word="investigation">investigation</span> <span word="by">by</span> <span word="finding">finding</span> <span word="out">out</span> <span word="what">what</span> <span word="other">other</span> <span word="scientists">scientists</span> <span word="have">have</span> <span word="learned">learned</span> <span word="about">about</span> <span word="a">a</span> <span word="particular">particular</span> <span word="problem">problem</span>. <span word="After">After</span> <span word="known">known</span> <span word="facts">facts</span> <span word="have">have</span> <span word="been">been</span> <span word="gathered">gathered</span>, <span word="the">the</span> <span word="scientist">scientist</span> <span word="comes">comes</span> <span word="to">to</span> <span word="the">the</span> <span word="part">part</span> <span word="of">of</span> <span word="the">the</span> <span word="investigation">investigation</span> <span word="that">that</span> <span word="requires">requires</span> <span word="considerable">considerable</span> <span word="imagination">imagination</span>. <span word="Possible">Possible</span> <span word="solutions">solutions</span> <span word="to">to</span> <span word="the">the</span> <span word="problem">problem</span> <span word="are">are</span> <span word="formulated">formulated</span>. <span word="These">These</span> <span word="possible">possible</span> <span word="solutions">solutions</span> <span word="are">are</span> <span word="called">called</span> <span word="hypotheses">hypotheses</span>.</p>
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