英语六级听力练习之最大的磁体
<p> <span word="The">The</span> <span word="Biggest">Biggest</span> <span word="Magnet">Magnet</span></p><p> 最大的磁体</p><p> <span word="A">A</span>: <span word="Whats">Whats</span> <span word="the">the</span> <span word="biggest">biggest</span> <span word="magnet">magnet</span> <span word="ever">ever</span>?</p><p> 究竟什么是最大的磁体?</p><p> <span word="B">B</span>: <span word="Well">Well</span>, <span word="thats">thats</span> <span word="a">a</span> <span word="great">great</span> <span word="question">question</span>. <span word="Well">Well</span>, <span word="for">for</span> <span word="starters">starters</span> <span word="youd">youd</span> <span word="have">have</span> <span word="to">to</span> <span word="mention">mention</span> <span word="whoppers">whoppers</span> <span word="like">like</span> <span word="the">the</span> <span word="hybrid">hybrid</span> <span word="magnet">magnet</span> <span word="at">at</span> <span word="the">the</span> <span word="National">National</span> <span word="High">High</span> <span word="Magnetic">Magnetic</span> <span word="Field">Field</span> <span word="Lab">Lab</span> <span word="in">in</span> <span word="Tallahassee">Tallahassee</span>, <span word="Florida">Florida</span>.<span word="This">This</span> <span word="magnet">magnet</span> <span word="weighs">weighs</span> <span word="thirty">thirty</span>-<span word="four">four</span> <span word="tons">tons</span> <span word="and">and</span> <span word="stands">stands</span> <span word="twenty">twenty</span>-<span word="two">two</span> <span word="feet">feet</span> <span word="tall">tall</span>.<span word="Giant">Giant</span> <span word="magnets">magnets</span> <span word="in">in</span> <span word="hospitals">hospitals</span>, <span word="physics">physics</span> <span word="labs">labs</span>, <span word="and">and</span> <span word="other">other</span> <span word="facilities">facilities</span> <span word="help">help</span> <span word="in">in</span> <span word="cutting">cutting</span> <span word="edge">edge</span> <span word="research">research</span>. <span word="However">However</span>, <span word="even">even</span> <span word="a">a</span> <span word="magnet">magnet</span> <span word="the">the</span> <span word="size">size</span> <span word="of">of</span> <span word="a">a</span> <span word="building">building</span> <span word="cant">cant</span> <span word="compete">compete</span> <span word="with">with</span> <span word="a">a</span> <span word="magnet">magnet</span> <span word="the">the</span> <span word="size">size</span> <span word="of">of</span> <span word="a">a</span> <span word="planet">planet</span>.</p><p> 嗯，问得好。对于初学者来说，不得不提一下那些庞然大物，比如佛罗里达塔拉哈西的国家高磁场实验室的混合磁体。这块磁铁重34吨，立起来有22英尺高。医院，物理实验室和其他设备里的巨型磁体对尖端研究有帮助。然而，即使是一块建筑物大小的磁体也不能和一块行星大小的磁体相匹敌。</p><p> <span word="A">A</span>: <span word="A">A</span> <span word="magnet">magnet</span> <span word="the">the</span> <span word="size">size</span> <span word="of">of</span> <span word="a">a</span> <span word="planet">planet</span>?</p><p> 一块行星大小的磁体?</p><p> <span word="B">B</span>: <span word="The">The</span> <span word="Earth">Earth</span> <span word="itself">itself</span> <span word="is">is</span> <span word="a">a</span> <span word="magnet">magnet</span>! <span word="Researchers">Researchers</span> <span word="think">think</span> <span word="its">its</span> <span word="the">the</span> <span word="effect">effect</span> <span word="of">of</span> <span word="convection">convection</span> <span word="currents">currents</span> <span word="in">in</span> <span word="our">our</span> <span word="planets">planets</span> <span word="molten">molten</span> <span word="interior">interior</span> <span word="that">that</span> <span word="causes">causes</span> <span word="the">the</span> <span word="entire">entire</span> <span word="Earth">Earth</span> <span word="to">to</span> <span word="behave">behave</span> <span word="as">as</span> <span word="one">one</span> <span word="gigantic">gigantic</span> <span word="magnet">magnet</span>, <span word="with">with</span> <span word="a">a</span> <span word="North">North</span> <span word="and">and</span> <span word="South">South</span> <span word="Pole">Pole</span>.<span word="Whenever">Whenever</span> <span word="you">you</span> <span word="look">look</span> <span word="at">at</span> <span word="a">a</span> <span word="compass">compass</span>, <span word="what">what</span> <span word="youre">youre</span> <span word="doing">doing</span> <span word="is">is</span> <span word="reading">reading</span> <span word="the">the</span> <span word="magnetic">magnetic</span> <span word="field">field</span> <span word="of">of</span> <span word="the">the</span> <span word="planet">planet</span> <span word="on">on</span> <span word="which">which</span> <span word="you">you</span> <span word="are">are</span> <span word="standing">standing</span>.</p>
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