gre写作涉及的话题实例:科学的含义
<p> <span word="During">During</span> <span word="scientific">scientific</span> <span word="investigations">investigations</span>, <span word="scientists">scientists</span> <span word="put">put</span> <span word="together">together</span> <span word="and">and</span> <span word="compare">compare</span> <span word="new">new</span> <span word="discoveries">discoveries</span> <span word="and">and</span> <span word="existing">existing</span> <span word="knowledge">knowledge</span>. <span word="In">In</span> <span word="most">most</span> <span word="cases">cases</span>, <span word="new">new</span> <span word="discoveries">discoveries</span> <span word="extend">extend</span> <span word="what">what</span> <span word="is">is</span> <span word="currently">currently</span> <span word="accepted">accepted</span>, <span word="providing">providing</span> <span word="further">further</span> <span word="evidence">evidence</span> <span word="that">that</span> <span word="existing">existing</span> <span word="ideas">ideas</span> <span word="are">are</span> <span word="correct">correct</span>. <span word="For">For</span> <span word="example">example</span>, <span word="in">in</span> 1676 <span word="the">the</span> <span word="English">English</span> <span word="physicist">physicist</span> <span word="Robert">Robert</span> <span word="Hooke">Hooke</span> <span word="discovered">discovered</span> <span word="that">that</span> <span word="elastic">elastic</span> <span word="objects">objects</span>, <span word="such">such</span> <span word="as">as</span> <span word="metal">metal</span> <span word="springs">springs</span>, <span word="stretch">stretch</span> <span word="in">in</span> <span word="proportion">proportion</span> <span word="to">to</span> <span word="the">the</span> <span word="force">force</span> <span word="that">that</span> <span word="acts">acts</span> <span word="on">on</span> <span word="them">them</span>. <span word="Despite">Despite</span> <span word="all">all</span> <span word="the">the</span> <span word="advances">advances</span> <span word="that">that</span> <span word="have">have</span> <span word="been">been</span> <span word="made">made</span> <span word="in">in</span> <span word="physics">physics</span> <span word="since">since</span> 1676, <span word="this">this</span> <span word="simple">simple</span> <span word="law">law</span> <span word="still">still</span> <span word="holds">holds</span> <span word="true">true</span>. <span word="Scientists">Scientists</span> <span word="utilize">utilize</span> <span word="existing">existing</span> <span word="knowledge">knowledge</span> <span word="in">in</span> <span word="new">new</span> <span word="scientific">scientific</span> <span word="investigations">investigations</span> <span word="to">to</span> <span word="predict">predict</span> <span word="how">how</span> <span word="things">things</span> <span word="will">will</span> <span word="behave">behave</span>. <span word="For">For</span> <span word="example">example</span>, <span word="a">a</span> <span word="scientist">scientist</span> <span word="who">who</span> <span word="knows">knows</span> <span word="the">the</span> <span word="exact">exact</span> <span word="dimensions">dimensions</span> <span word="of">of</span> <span word="a">a</span> <span word="lens">lens</span> <span word="can">can</span> <span word="predict">predict</span> <span word="how">how</span> <span word="the">the</span> <span word="lens">lens</span> <span word="will">will</span> <span word="focus">focus</span> <span word="a">a</span> <span word="beam">beam</span> <span word="of">of</span> <span word="light">light</span>. <span word="In">In</span> <span word="the">the</span> <span word="same">same</span> <span word="way">way</span>, <span word="by">by</span> <span word="knowing">knowing</span> <span word="the">the</span> <span word="exact">exact</span> <span word="makeup">makeup</span> <span word="and">and</span> <span word="properties">properties</span> <span word="of">of</span> <span word="two">two</span> <span word="chemicals">chemicals</span>, <span word="a">a</span> <span word="researcher">researcher</span> <span word="can">can</span> <span word="predict">predict</span> <span word="what">what</span> <span word="will">will</span> <span word="happen">happen</span> <span word="when">when</span> <span word="they">they</span> <span word="combine">combine</span>. <span word="Sometimes">Sometimes</span> <span word="scientific">scientific</span> <span word="predictions">predictions</span> <span word="go">go</span> <span word="much">much</span> <span word="further">further</span> <span word="by">by</span> <span word="describing">describing</span> <span word="objects">objects</span> <span word="or">or</span> <span word="events">events</span> <span word="that">that</span> <span word="are">are</span> <span word="not">not</span> <span word="yet">yet</span> <span word="known">known</span>. <span word="An">An</span> <span word="outstanding">outstanding</span> <span word="instance">instance</span> <span word="occurred">occurred</span> <span word="in">in</span> 1869, <span word="when">when</span> <span word="the">the</span> <span word="Russian">Russian</span> <span word="chemist">chemist</span> <span word="Dmitry">Dmitry</span> <span word="Mendeleyev">Mendeleyev</span> <span word="drew">drew</span> <span word="up">up</span> <span word="a">a</span> <span word="periodic">periodic</span> <span word="table">table</span> <span word="of">of</span> <span word="the">the</span> <span word="elements">elements</span> <span word="arranged">arranged</span> <span word="to">to</span> <span word="illustrate">illustrate</span> <span word="patterns">patterns</span> <span word="of">of</span> <span word="recurring">recurring</span> <span word="chemical">chemical</span> <span word="and">and</span> <span word="physical">physical</span> <span word="properties">properties</span>. <span word="Mendeleyev">Mendeleyev</span> <span word="used">used</span> <span word="this">this</span> <span word="table">table</span> <span word="to">to</span> <span word="predict">predict</span> <span word="the">the</span> <span word="existence">existence</span> <span word="and">and</span> <span word="describe">describe</span> <span word="the">the</span> <span word="properties">properties</span> <span word="of">of</span> <span word="several">several</span> <span word="elements">elements</span> <span word="unknown">unknown</span> <span word="in">in</span> <span word="his">his</span> <span word="day">day</span>, <span word="and">and</span> <span word="when">when</span> <span word="the">the</span> <span word="elements">elements</span> <span word="were">were</span> <span word="discovered">discovered</span> <span word="several">several</span> <span word="years">years</span> <span word="later">later</span>, <span word="his">his</span> <span word="predictions">predictions</span> <span word="proved">proved</span> <span word="to">to</span> <span word="be">be</span> <span word="correct">correct</span>.<span word="In">In</span> <span word="science">science</span>, <span word="important">important</span> <span word="advances">advances</span> <span word="can">can</span> <span word="also">also</span> <span word="be">be</span> <span word="made">made</span> <span word="when">when</span> <span word="current">current</span> <span word="ideas">ideas</span> <span word="are">are</span> <span word="shown">shown</span> <span word="to">to</span> <span word="be">be</span> <span word="wrong">wrong</span>. <span word="A">A</span> <span word="classic">classic</span> <span word="case">case</span> <span word="of">of</span> <span word="this">this</span> <span word="occurred">occurred</span> <span word="early">early</span> <span word="in">in</span> <span word="the">the</span> 20<span word="th">th</span> <span word="century">century</span>, <span word="when">when</span> <span word="the">the</span> <span word="German">German</span> <span word="geologist">geologist</span> <span word="Alfred">Alfred</span> <span word="Wegener">Wegener</span> <span word="suggested">suggested</span> <span word="that">that</span> <span word="the">the</span> <span word="continents">continents</span> <span word="were">were</span> <span word="at">at</span> <span word="one">one</span> <span word="time">time</span> <span word="connected">connected</span>, <span word="a">a</span> <span word="theory">theory</span> <span word="known">known</span> <span word="as">as</span> <span word="continental">continental</span> <span word="drift">drift</span>. <span word="At">At</span> <span word="the">the</span> <span word="time">time</span>, <span word="most">most</span> <span word="geologists">geologists</span> <span word="discounted">discounted</span> <span word="Wegeners">Wegeners</span> <span word="ideas">ideas</span>, <span word="because">because</span> <span word="the">the</span> <span word="Earths">Earths</span> <span word="crust">crust</span> <span word="seemed">seemed</span> <span word="to">to</span> <span word="be">be</span> <span word="fixed">fixed</span>. <span word="But">But</span> <span word="following">following</span> <span word="the">the</span> <span word="discovery">discovery</span> <span word="of">of</span> <span word="plate">plate</span> <span word="tectonics">tectonics</span> <span word="in">in</span> <span word="the">the</span> 1960<span word="s">s</span>, <span word="in">in</span> <span word="which">which</span> <span word="scientists">scientists</span> <span word="found">found</span> <span word="that">that</span> <span word="the">the</span> <span word="Earths">Earths</span> <span word="crust">crust</span> <span word="is">is</span> <span word="actually">actually</span> <span word="made">made</span> <span word="of">of</span> <span word="moving">moving</span> <span word="plates">plates</span>, <span word="continental">continental</span> <span word="drift">drift</span> <span word="became">became</span> <span word="an">an</span> <span word="important">important</span> <span word="part">part</span> <span word="of">of</span> <span word="geology">geology</span>.<span word="Through">Through</span> <span word="advances">advances</span> <span word="like">like</span> <span word="these">these</span>, <span word="scientific">scientific</span> <span word="knowledge">knowledge</span> <span word="is">is</span> <span word="constantly">constantly</span> <span word="added">added</span> <span word="to">to</span> <span word="and">and</span> <span word="refined">refined</span>. <span word="As">As</span> <span word="a">a</span> <span word="result">result</span>, <span word="science">science</span> <span word="gives">gives</span> <span word="us">us</span> <span word="an">an</span> <span word="ever">ever</span> <span word="more">more</span> <span word="detailed">detailed</span> <span word="insight">insight</span> <span word="into">into</span> <span word="the">the</span> <span word="way">way</span> <span word="the">the</span> <span word="world">world</span> <span word="around">around</span> <span word="us">us</span>.</p>
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