大学英语六级考试阅读：背诵美文(3)
<p> <span word="Animals">Animals</span> <span word="Compasses">Compasses</span></p><p> <span word="Researchers">Researchers</span> <span word="have">have</span> <span word="found">found</span> <span word="that">that</span> <span word="migrating">migrating</span> <span word="animals">animals</span> <span word="use">use</span> <span word="a">a</span> <span word="variety">variety</span> <span word="of">of</span> <span word="inner">inner</span> <span word="compasses">compasses</span> <span word="to">to</span> <span word="help">help</span> <span word="them">them</span> <span word="navigate">navigate</span>. <span word="Some">Some</span> <span word="steer">steer</span> <span word="by">by</span> <span word="the">the</span> <span word="position">position</span> <span word="of">of</span> <span word="the">the</span> <span word="Sun">Sun</span>. <span word="Others">Others</span> <span word="navigate">navigate</span> <span word="by">by</span> <span word="the">the</span> <span word="stars">stars</span>. <span word="Some">Some</span> <span word="use">use</span> <span word="the">the</span> <span word="Sun">Sun</span> <span word="as">as</span> <span word="their">their</span> <span word="guide">guide</span> <span word="during">during</span> <span word="the">the</span> <span word="day">day</span> <span word="and">and</span> <span word="then">then</span> <span word="switch">switch</span> <span word="to">to</span> <span word="star">star</span> <span word="navigation">navigation</span> <span word="by">by</span> <span word="night">night</span>. <span word="One">One</span> <span word="study">study</span> <span word="shows">shows</span> <span word="that">that</span> <span word="the">the</span> <span word="homing">homing</span> <span word="pigeon">pigeon</span> <span word="uses">uses</span> <span word="the">the</span> <span word="Earths">Earths</span> <span word="magnetic">magnetic</span> <span word="fields">fields</span> <span word="as">as</span> <span word="a">a</span> <span word="guide">guide</span> <span word="in">in</span> <span word="finding">finding</span> <span word="its">its</span> <span word="way">way</span> <span word="home">home</span> <span word="and">and</span> <span word="there">there</span> <span word="are">are</span> <span word="indications">indications</span> <span word="that">that</span> <span word="various">various</span> <span word="other">other</span> <span word="animals">animals</span> <span word="from">from</span> <span word="insects">insects</span> <span word="to">to</span> <span word="mollusks">mollusks</span>, <span word="can">can</span> <span word="also">also</span> <span word="make">make</span> <span word="use">use</span> <span word="of">of</span> <span word="magnetic">magnetic</span> <span word="compasses">compasses</span>. <span word="It">It</span> <span word="is">is</span> <span word="of">of</span> <span word="course">course</span> <span word="very">very</span> <span word="useful">useful</span> <span word="for">for</span> <span word="a">a</span> <span word="migrating">migrating</span> <span word="bird">bird</span> <span word="to">to</span> <span word="be">be</span> <span word="able">able</span> <span word="to">to</span> <span word="switch">switch</span> <span word="to">to</span> <span word="a">a</span> <span word="magnetic">magnetic</span> <span word="compass">compass</span> <span word="when">when</span> <span word="clouds">clouds</span> <span word="cover">cover</span> <span word="the">the</span> <span word="Sun">Sun</span>; <span word="otherwise">otherwise</span> <span word="it">it</span> <span word="would">would</span> <span word="just">just</span> <span word="have">have</span> <span word="to">to</span> <span word="land">land</span> <span word="and">and</span> <span word="wait">wait</span> <span word="for">for</span> <span word="the">the</span> <span word="Sun">Sun</span> <span word="to">to</span> <span word="come">come</span> <span word="out">out</span> <span word="again">again</span>. <span word="Even">Even</span> <span word="with">with</span> <span word="the">the</span> <span word="Sun">Sun</span> <span word="or">or</span> <span word="stars">stars</span> <span word="to">to</span> <span word="steer">steer</span> <span word="by">by</span>, <span word="the">the</span> <span word="problems">problems</span> <span word="of">of</span> <span word="navigation">navigation</span> <span word="are">are</span> <span word="more">more</span> <span word="complicated">complicated</span> <span word="than">than</span> <span word="they">they</span> <span word="might">might</span> <span word="seem">seem</span> <span word="at">at</span> <span word="first">first</span>. <span word="For">For</span> <span word="example">example</span>, <span word="a">a</span> <span word="worker">worker</span> <span word="honeybee">honeybee</span> <span word="that">that</span> <span word="has">has</span> <span word="found">found</span> <span word="a">a</span> <span word="rich">rich</span> <span word="source">source</span> <span word="of">of</span> <span word="nectar">nectar</span> <span word="and">and</span> <span word="pollen">pollen</span> <span word="flies">flies</span> <span word="rapidly">rapidly</span> <span word="home">home</span> <span word="to">to</span> <span word="the">the</span> <span word="hive">hive</span> <span word="to">to</span> <span word="report">report</span>. <span word="A">A</span> <span word="naturalist">naturalist</span> <span word="has">has</span> <span word="discovered">discovered</span> <span word="that">that</span> <span word="the">the</span> <span word="bee">bee</span> <span word="scout">scout</span> <span word="delivers">delivers</span> <span word="her">her</span> <span word="report">report</span> <span word="through">through</span> <span word="a">a</span> <span word="complicated">complicated</span> <span word="dance">dance</span> <span word="in">in</span> <span word="the">the</span> <span word="hive">hive</span>, <span word="in">in</span> <span word="which">which</span> <span word="she">she</span> <span word="tells">tells</span> <span word="the">the</span> <span word="other">other</span> <span word="workers">workers</span> <span word="not">not</span> <span word="only">only</span> <span word="how">how</span> <span word="far">far</span> <span word="away">away</span> <span word="the">the</span> <span word="food">food</span> <span word="is">is</span>, <span word="but">but</span> <span word="also">also</span> <span word="what">what</span> <span word="direction">direction</span> <span word="to">to</span> <span word="fly">fly</span> <span word="in">in</span> <span word="relation">relation</span> <span word="to">to</span> <span word="the">the</span> <span word="Sun">Sun</span>. <span word="But">But</span> <span word="the">the</span> <span word="Sun">Sun</span> <span word="does">does</span> <span word="not">not</span> <span word="stay">stay</span> <span word="in">in</span> <span word="one">one</span> <span word="place">place</span> <span word="all">all</span> <span word="day">day</span>. <span word="As">As</span> <span word="the">the</span> <span word="workers">workers</span> <span word="start">start</span> <span word="out">out</span> <span word="to">to</span> <span word="gather">gather</span> <span word="the">the</span> <span word="food">food</span>, <span word="the">the</span> <span word="Sun">Sun</span> <span word="may">may</span> <span word="already">already</span> <span word="have">have</span> <span word="changed">changed</span> <span word="its">its</span> <span word="position">position</span> <span word="in">in</span> <span word="the">the</span> <span word="sky">sky</span> <span word="somewhat">somewhat</span>. <span word="In">In</span> <span word="later">later</span> <span word="trips">trips</span> <span word="during">during</span> <span word="the">the</span> <span word="day">day</span>, <span word="the">the</span> <span word="Sun">Sun</span> <span word="will">will</span> <span word="seem">seem</span> <span word="to">to</span> <span word="move">move</span> <span word="farther">farther</span> <span word="and">and</span> <span word="farther">farther</span> <span word="toward">toward</span> <span word="the">the</span> <span word="west">west</span>. <span word="Yet">Yet</span> <span word="the">the</span> <span word="worker">worker</span> <span word="bees">bees</span> <span word="seem">seem</span> <span word="to">to</span> <span word="have">have</span> <span word="no">no</span> <span word="trouble">trouble</span> <span word="at">at</span> <span word="all">all</span> <span word="in">in</span> <span word="finding">finding</span> <span word="the">the</span> <span word="food">food</span> <span word="source">source</span>. <span word="Their">Their</span> <span word="inner">inner</span> <span word="clocks">clocks</span> <span word="tell">tell</span> <span word="them">them</span> <span word="just">just</span> <span word="where">where</span> <span word="the">the</span> <span word="Sun">Sun</span> <span word="will">will</span> <span word="be">be</span> <span word="and">and</span> <span word="they">they</span> <span word="change">change</span> <span word="their">their</span> <span word="course">course</span> <span word="correspondingly">correspondingly</span>.</p>
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