写作：GRE作文ARGUMENT126篇真题三八
<p> ３８、<span word="The">The</span> <span word="following">following</span> <span word="is">is</span> <span word="a">a</span> <span word="letter">letter</span> <span word="to">to</span> <span word="the">the</span> <span word="editor">editor</span> <span word="of">of</span> <span word="an">an</span> <span word="environmental">environmental</span> <span word="magazine">magazine</span>.</p><p> <span word="The">The</span> <span word="decline">decline</span> <span word="in">in</span> <span word="the">the</span> <span word="numbers">numbers</span> <span word="of">of</span> <span word="amphibians">amphibians</span> <span word="worldwide">worldwide</span> <span word="clearly">clearly</span> <span word="indicates">indicates</span> <span word="the">the</span> <span word="global">global</span> <span word="pollution">pollution</span> <span word="of">of</span> <span word="water">water</span> <span word="and">and</span> <span word="air">air</span>. <span word="Two">Two</span> <span word="studies">studies</span> <span word="of">of</span> <span word="amphibians">amphibians</span> <span word="in">in</span> <span word="Yosemite">Yosemite</span> <span word="National">National</span> <span word="Park">Park</span> <span word="in">in</span> <span word="California">California</span> <span word="confirm">confirm</span> <span word="my">my</span> <span word="conclusion">conclusion</span>. <span word="In">In</span> 1915 <span word="there">there</span> <span word="were">were</span> <span word="seven">seven</span> <span word="species">species</span> <span word="of">of</span> <span word="amphibians">amphibians</span> <span word="in">in</span> <span word="the">the</span> <span word="park">park</span>, <span word="and">and</span> <span word="there">there</span> <span word="were">were</span> <span word="abundant">abundant</span> <span word="numbers">numbers</span> <span word="of">of</span> <span word="each">each</span> <span word="species">species</span>. <span word="However">However</span>, <span word="in">in</span> 1992 <span word="there">there</span> <span word="were">were</span> <span word="only">only</span> <span word="four">four</span> <span word="species">species</span> <span word="of">of</span> <span word="amphibians">amphibians</span> <span word="observed">observed</span> <span word="in">in</span> <span word="the">the</span> <span word="park">park</span>, <span word="and">and</span> <span word="the">the</span> <span word="numbers">numbers</span> <span word="of">of</span> <span word="each">each</span> <span word="species">species</span> <span word="were">were</span> <span word="drastically">drastically</span> <span word="reduced">reduced</span>. <span word="The">The</span> <span word="decline">decline</span> <span word="in">in</span> <span word="Yosemite">Yosemite</span> <span word="has">has</span> <span word="been">been</span> <span word="blamed">blamed</span> <span word="on">on</span> <span word="the">the</span> <span word="introduction">introduction</span> <span word="of">of</span> <span word="trout">trout</span> <span word="into">into</span> <span word="the">the</span> <span word="parks">parks</span> <span word="waters">waters</span>, <span word="which">which</span> <span word="began">began</span> <span word="in">in</span> 1920 . <span word="But">But</span> <span word="the">the</span> <span word="introduction">introduction</span> <span word="of">of</span> <span word="trout">trout</span> <span word="cannot">cannot</span> <span word="be">be</span> <span word="the">the</span> <span word="real">real</span> <span word="reason">reason</span> <span word="for">for</span> <span word="the">the</span> <span word="Yosemite">Yosemite</span> <span word="decline">decline</span> <span word="because">because</span> <span word="it">it</span> <span word="does">does</span> <span word="not">not</span> <span word="explain">explain</span> <span word="the">the</span> <span word="worldwide">worldwide</span> <span word="decline">decline</span>.</p><p> </p>
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