GRE阅读难句背诵实例（四）
<p> 编辑点评： <span word="GRE">GRE</span>阅读的复习和作文的复习往往可以相辅相成，这里为大家精选了一些阅读中的句子，大家可以选择性地用在作文中作为一个例证。也可以参考句子的结构自己学着写一下结构较为复杂的句子。</p><p> 18.<span word="Although">Although</span> <span word="these">these</span> <span word="molecules">molecules</span> <span word="allow">allow</span> <span word="radiation">radiation</span> <span word="at">at</span> <span word="visible">visible</span> <span word="wavelengths">wavelengths</span>，<span word="where">where</span> <span word="most">most</span> <span word="of">of</span> <span word="the">the</span> <span word="energy">energy</span> <span word="of">of</span> <span word="sunlight">sunlight</span> <span word="is">is</span> <span word="concentrated">concentrated</span>，<span word="to">to</span> <span word="passthrough">passthrough</span>，<span word="they">they</span> <span word="absorb">absorb</span> <span word="some">some</span> <span word="of">of</span> <span word="the">the</span> <span word="longer">longer</span>-<span word="wavelength">wavelength</span>，<span word="infrared">infrared</span> <span word="emissionsradiated">emissionsradiated</span> <span word="from">from</span> <span word="the">the</span> <span word="Earth">Earth</span> <span word="s">s</span> <span word="surface">surface</span>，<span word="radiation">radiation</span> <span word="that">that</span> <span word="would">would</span> <span word="otherwise">otherwise</span> <span word="betransmitted">betransmitted</span> <span word="back">back</span> <span word="into">into</span> <span word="space">space</span>.</p><p> 虽然这些分子允许可见波长的辐射 阳光的绝大部分能量就汇集于此 不受阻挡地穿透，但它们却会吸收某些较长波长，亦即从地球表面辐射出的红外发射，这种辐射若不是二氧化碳的缘故就会被重新输送回太空。</p><p> 19.<span word="The">The</span> <span word="role">role</span> <span word="those">those</span> <span word="anthropologists">anthropologists</span> <span word="ascribe">ascribe</span> <span word="to">to</span> <span word="evolution">evolution</span> <span word="is">is</span> <span word="not">not</span> <span word="ofdictating">ofdictating</span> <span word="the">the</span> <span word="details">details</span> <span word="of">of</span> <span word="human">human</span> <span word="behavior">behavior</span> <span word="but">but</span> <span word="one">one</span> <span word="of">of</span> <span word="imposingconstraints">imposingconstraints</span> <span word="ways">ways</span> <span word="of">of</span> <span word="feeling">feeling</span>，<span word="thinking">thinking</span>，<span word="and">and</span> <span word="acting">acting</span> <span word="that">that</span> <span word="come">come</span> <span word="naturally">naturally</span> <span word="in">in</span> <span word="archetypal">archetypal</span> <span word="situations">situations</span> <span word="in">in</span> <span word="any">any</span> <span word="culture">culture</span>.</p><p> 这些人类学家所归诸于生物进化的作用，不是规定人类行为的种种细节，而是将各种限制强加于人类 即在任何文化的典型情景中都会 自然表露 的情感、思维、以及行动方式。</p><p> 20.<span word="A">A</span> <span word="low">low</span> <span word="number">number</span> <span word="of">of</span> <span word="algal">algal</span> <span word="cells">cells</span> <span word="in">in</span> <span word="the">the</span> <span word="presence">presence</span> <span word="of">of</span> <span word="a">a</span> <span word="high">high</span> <span word="number">number</span> <span word="ofgrazers">ofgrazers</span> <span word="suggested">suggested</span>，<span word="but">but</span> <span word="did">did</span> <span word="not">not</span> <span word="prove">prove</span>， <span word="that">that</span> <span word="the">the</span> <span word="grazers">grazers</span> <span word="had">had</span> <span word="removed">removed</span> <span word="mostof">mostof</span> <span word="the">the</span> <span word="algae">algae</span>.</p>
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