2015考研英语阅读牙齿的痕迹
<p> <span word="Remember">Remember</span> <span word="the">the</span> <span word="tooth">tooth</span></p><p> 牙齿的痕迹</p><p> <span word="A">A</span> <span word="link">link</span> <span word="is">is</span> <span word="made">made</span> <span word="in">in</span> <span word="an">an</span> <span word="ancient">ancient</span> <span word="ecosystem">ecosystem</span></p><p> 古代生态系统中的线索</p><p> <span word="WHO">WHO</span> <span word="ate">ate</span> <span word="whom">whom</span> <span word="in">in</span> <span word="the">the</span> <span word="food">food</span> <span word="chains">chains</span> <span word="of">of</span> <span word="the">the</span> <span word="past">past</span> <span word="is">is</span> <span word="rarely">rarely</span> <span word="clear">clear</span>.</p><p> 在古代谁以吃谁为生是不清楚的。</p><p> <span word="Though">Though</span> <span word="it">it</span> <span word="is">is</span> <span word="obvious">obvious</span> <span word="which">which</span> <span word="species">species</span> <span word="were">were</span> <span word="predators">predators</span> <span word="and">and</span> <span word="which">which</span> <span word="prey">prey</span>,</p><p> 尽管谁是捕食者和谁是猎物是很明显的,</p><p> <span word="the">the</span> <span word="subtle">subtle</span> <span word="specialisations">specialisations</span> <span word="of">of</span> <span word="feeding">feeding</span> <span word="habit">habit</span> <span word="that">that</span> <span word="allow">allow</span> <span word="many">many</span> <span word="types">types</span> <span word="of">of</span> <span word="carnivore">carnivore</span> <span word="to">to</span> <span word="co">co</span>-<span word="exist">exist</span> <span word="arerarely">arerarely</span> <span word="preserved">preserved</span> <span word="in">in</span> <span word="the">the</span> <span word="fossil">fossil</span> <span word="record">record</span>.</p><p> 但是专门的微妙的捕食习惯,能让多种食肉动物能够共存的资料很少有保存完好的化石记录。</p><p> <span word="Rarely">Rarely</span>, <span word="but">but</span> <span word="not">not</span> <span word="never">never</span>.</p><p> 很少有记录不表示没有。</p><p> <span word="That">That</span> <span word="is">is</span> <span word="why">why</span> <span word="the">the</span> <span word="recent">recent</span> <span word="discovery">discovery</span> <span word="of">of</span> <span word="a">a</span> <span word="Jurassic">Jurassic</span> <span word="ammonite">ammonite</span> <span word="with">with</span> <span word="a">a</span> <span word="shark">shark</span> <span word="s">s</span> <span word="tooth">tooth</span> <span word="embedded">embedded</span> <span word="inits">inits</span> <span word="shell">shell</span> <span word="has">has</span> <span word="excited">excited</span> <span word="palaeontologists">palaeontologists</span>.</p><p> 这就是为什么最近发现侏罗纪菊石，连同壳上面的鲨鱼牙齿让古生物学家非常兴奋。</p><p> <span word="The">The</span> <span word="ammonite">ammonite</span> <span word="in">in</span> <span word="question">question</span>, <span word="Orthaspidoceras">Orthaspidoceras</span>, <span word="a">a</span> <span word="species">species</span> <span word="that">that</span> <span word="thrived">thrived</span> 155<span word="m">m</span> <span word="years">years</span> <span word="ago">ago</span>,</p><p> 发现的鹦鹉螺是一种叫<span word="Orthaspidoceras">Orthaspidoceras</span>的生活在一亿五千五百万年前的生物，</p><p> <span word="was">was</span> <span word="part">part</span> <span word="of">of</span> <span word="the">the</span> <span word="collection">collection</span> <span word="of">of</span> <span word="an">an</span> <span word="amateur">amateur</span> <span word="who">who</span> <span word="did">did</span> <span word="not">not</span> <span word="realise">realise</span> <span word="the">the</span> <span word="significance">significance</span> <span word="of">of</span> <span word="what">what</span> <span word="he">he</span> <span word="hadfound">hadfound</span>.</p>
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