考研网校复习专区英语阅读二:生物与环境平衡的危机
<p> <span word="The">The</span> <span word="history">history</span> <span word="of">of</span> <span word="life">life</span> <span word="on">on</span> <span word="earth">earth</span> <span word="has">has</span> <span word="been">been</span> <span word="a">a</span> <span word="history">history</span> <span word="of">of</span> <span word="interaction">interaction</span> <span word="between">between</span> <span word="living">living</span> <span word="things">things</span> <span word="and">and</span> <span word="their">their</span> <span word="surroundings">surroundings</span>. <span word="To">To</span> <span word="a">a</span> <span word="large">large</span> <span word="extent">extent</span>,<span word="the">the</span> <span word="physical">physical</span> <span word="form">form</span> <span word="and">and</span> <span word="the">the</span> <span word="habits">habits</span> <span word="of">of</span> <span word="the">the</span> <span word="earths">earths</span> <span word="vegetation">vegetation</span> <span word="and">and</span> <span word="its">its</span> <span word="animal">animal</span> <span word="life">life</span> <span word="have">have</span> <span word="been">been</span> <span word="molded">molded</span> <span word="by">by</span> <span word="the">the</span> <span word="environment">environment</span>. <span word="Considering">Considering</span> <span word="the">the</span> <span word="whole">whole</span> <span word="span">span</span> <span word="of">of</span> <span word="earthly">earthly</span> <span word="time">time</span>,<span word="the">the</span> <span word="opposite">opposite</span> <span word="effect">effect</span>,<span word="in">in</span> <span word="which">which</span> <span word="life">life</span> <span word="actually">actually</span> <span word="modifies">modifies</span> <span word="its">its</span> <span word="surroundings">surroundings</span>,<span word="has">has</span> <span word="been">been</span> <span word="relatively">relatively</span> <span word="slight">slight</span>. <span word="Only">Only</span> <span word="in">in</span> <span word="the">the</span> <span word="present">present</span> <span word="century">century</span> <span word="has">has</span> <span word="one">one</span> <span word="species">species</span> <span word="man">man</span> <span word="acquired">acquired</span> <span word="significant">significant</span> <span word="power">power</span> <span word="to">to</span> <span word="alter">alter</span> <span word="the">the</span> <span word="nature">nature</span> <span word="of">of</span> <span word="his">his</span> <span word="world">world</span>.</p><p> <span word="During">During</span> <span word="the">the</span> <span word="past">past</span> <span word="quarter">quarter</span> <span word="century">century</span> <span word="this">this</span> <span word="power">power</span> <span word="has">has</span> <span word="not">not</span> <span word="only">only</span> <span word="become">become</span> <span word="increasingly">increasingly</span> <span word="great">great</span> <span word="but">but</span> <span word="it">it</span> <span word="has">has</span> <span word="changed">changed</span> <span word="in">in</span> <span word="character">character</span>. <span word="The">The</span> <span word="most">most</span> <span word="alarming">alarming</span> <span word="of">of</span> <span word="all">all</span> <span word="mans">mans</span> <span word="assaults">assaults</span> <span word="upon">upon</span> <span word="the">the</span> <span word="environment">environment</span> <span word="is">is</span> <span word="the">the</span> <span word="contamination">contamination</span> <span word="of">of</span> <span word="air">air</span>,<span word="earth">earth</span>,<span word="rivers">rivers</span>,<span word="and">and</span> <span word="sea">sea</span> <span word="with">with</span> <span word="dangerous">dangerous</span> <span word="and">and</span> <span word="even">even</span> <span word="lethal">lethal</span> <span word="materials">materials</span>. <span word="This">This</span> <span word="pollution">pollution</span> <span word="is">is</span> <span word="for">for</span> <span word="the">the</span> <span word="most">most</span> <span word="part">part</span> <span word="irrecoverable">irrecoverable</span>. <span word="In">In</span> <span word="this">this</span> <span word="now">now</span> <span word="universal">universal</span> <span word="contamination">contamination</span> <span word="of">of</span> <span word="the">the</span> <span word="environment">environment</span>,<span word="chemicals">chemicals</span> <span word="are">are</span> <span word="the">the</span> <span word="sinister">sinister</span> <span word="partners">partners</span> <span word="of">of</span> <span word="radiation">radiation</span> <span word="in">in</span> <span word="changing">changing</span> <span word="the">the</span> <span word="very">very</span> <span word="nature">nature</span> <span word="of">of</span> <span word="the">the</span> <span word="world">world</span> <span word="the">the</span> <span word="very">very</span> <span word="nature">nature</span> <span word="of">of</span> <span word="its">its</span> <span word="life">life</span>. <span word="Chemicals">Chemicals</span> <span word="sprayed">sprayed</span> <span word="on">on</span> <span word="croplands">croplands</span> <span word="or">or</span> <span word="forests">forests</span> <span word="or">or</span> <span word="gardens">gardens</span> <span word="lie">lie</span> <span word="long">long</span> <span word="in">in</span> <span word="soil">soil</span>,<span word="entering">entering</span> <span word="into">into</span> <span word="living">living</span> <span word="organisms">organisms</span>,<span word="passing">passing</span> <span word="from">from</span> <span word="one">one</span> <span word="to">to</span> <span word="another">another</span> <span word="in">in</span> <span word="a">a</span> <span word="chain">chain</span> <span word="of">of</span> <span word="poisoning">poisoning</span> <span word="and">and</span> <span word="death">death</span>. <span word="Or">Or</span> <span word="they">they</span> <span word="pass">pass</span> <span word="mysteriously">mysteriously</span> <span word="by">by</span> <span word="underground">underground</span> <span word="streams">streams</span> <span word="until">until</span> <span word="they">they</span> <span word="emerge">emerge</span> <span word="and">and</span> <span word="combine">combine</span> <span word="into">into</span> <span word="new">new</span> <span word="forms">forms</span> <span word="that">that</span> <span word="kill">kill</span> <span word="vegetation">vegetation</span>,<span word="sicken">sicken</span> <span word="cattle">cattle</span>,<span word="and">and</span> <span word="work">work</span> <span word="unknown">unknown</span> <span word="harm">harm</span> <span word="on">on</span> <span word="those">those</span> <span word="who">who</span> <span word="drink">drink</span> <span word="from">from</span> <span word="once">once</span> <span word="pure">pure</span> <span word="wells">wells</span>. <span word="Man">Man</span> <span word="can">can</span> <span word="hardly">hardly</span> <span word="even">even</span> <span word="recognize">recognize</span> <span word="the">the</span> <span word="devils">devils</span> <span word="of">of</span> <span word="his">his</span> <span word="own">own</span> <span word="creation">creation</span>， <span word="as">as</span> <span word="a">a</span> <span word="scientist">scientist</span> <span word="has">has</span> <span word="said">said</span>.</p><p> <span word="It">It</span> <span word="took">took</span> <span word="hundreds">hundreds</span> <span word="of">of</span> <span word="millions">millions</span> <span word="of">of</span> <span word="years">years</span> <span word="to">to</span> <span word="produce">produce</span> <span word="the">the</span> <span word="life">life</span> <span word="that">that</span> <span word="now">now</span> <span word="inhabits">inhabits</span> <span word="the">the</span> <span word="earth">earth</span>. <span word="Given">Given</span> <span word="time">time</span> <span word="not">not</span> <span word="in">in</span> <span word="years">years</span> <span word="but">but</span> <span word="in">in</span> <span word="millennia">millennia</span> <span word="life">life</span> <span word="adjusts">adjusts</span>,<span word="and">and</span> <span word="a">a</span> <span word="balance">balance</span> <span word="has">has</span> <span word="been">been</span> <span word="reached">reached</span>. <span word="But">But</span> <span word="in">in</span> <span word="the">the</span> <span word="modern">modern</span> <span word="world">world</span> <span word="there">there</span> <span word="is">is</span> <span word="no">no</span> <span word="time">time</span>.</p>
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