2012年5月12日托福听力解析

　　Conversation
　　第一篇
　　1.某学生觉得他室友太有目标，而自己没有，而且向老师询问一些选课的问题（问学生提到了哪些课，有题，双选），还觉得室友选的体育课对于自己的学术不太有用（他来是为了学术，有重听题）老师向他建议一个team-building的课，可以增强leadership等等（有题，问老师为什么如此建议）
　　第二篇
　　2：男生错过了上周班级同学一起去museum看的一个展览，于是来找museum工作人员。工作人员说“好可惜啊，因为平时我们只展出全部展品的一小部分”（意思是那次他们班去看是特例，给他们看了好多平时没有的）。然后好像因为这个男生正在研究/写的论文要用到这些展品的知识，museum工作人员就说“那你可以给XXX发个邮件约个时间让他（上次班级一起的时候也是这个人讲解的）再给你讲讲，他会很乐意的，并且你还是有机会看到部分你错过的展品的”
　　Lecture
　　第一篇
　　Marine biology：人们一直认为海底的鱼是不会发生声音的，但是海底的潜水艇在发射声波的时候发现了有杂音，进而引出了研究海底鱼声音的研究（此处有题）然后教授接着用研究鸟的声音打比方，说如果只盯着鸟的图片而不关注声音岂非很可笑（有重听题）然后作者又提到鱼声音的影响，就是在一个长期调查的地方发现了一种新的eel 因为他们一般都是晚上活动。Eels are elongated fish in the slender giant moray. Adults range in weight from 30 grams to well over 25 kilograms. They possess no pelvic fins, and many species also lack pectoral fins. The dorsal and anal fins are fused with the caudal or tail fin, forming a single ribbon running along much of the length of the animal.
　　Most eels live in the shallow waters of the ocean and burrow into sand, mud, or amongst rocks. A majority of eel species are nocturnal, and thus are rarely seen. Sometimes, they are seen living together in holes, or "eel pits". Some species of eels also live in deeper water on the continental shelves and over the slopes deep as 4,000 metres. Only members of the Anguillidae family regularly inhabit fresh water, but they too return to the sea to breed.
　　Eels begin life as flat and transparent larvae, or leptocephali. Eel larvae drift in the surface waters of the sea feeding on marine snow, small particles that float in the water. Eel larvae then metamorphose into glass eels and then become elvers before finally seeking out their juvenile and adult habitats.
　　所以之前就没有发现，教授接着提到鱼的Buldder除了可以使鱼漂浮起来，还可以诈骗声音还可以传送回声（有多选）之后教授还有提到通过鱼的声音可以判断鱼的大小，因为回声的关系。最后提到人类声音对鱼类的影响。
　　第二篇
　　农业的发展：很早以前小麦啊都是野生的，只能是穗子掉到地上后人们去捡，后来人类慢慢把他们domesticate了，他们成熟后穗子不会掉落了，会在枝上挂着等人们去收。
　　第三篇
　　Lunar soil is the fine fraction of the regolith found on the surface of the Moon. Its properties can differ significantly from those of terrestrial soil. The physical properties of lunar soil are primarily the result of mechanical disintegration of basaltic and anorthositic rock, caused by continuous meteoric impact and bombardment by interstellar charged atomic particles over billions of years. The process is largely one of mechanical erosion in which the particles are ground to finer and finer size over time. This situation contrasts fundamentally to terrestrial soil formation, mediated by the presence of molecular oxygen , humidity, atmospheric wind, and a robust array of contributing biological processes.
　　Some have argued that the term "soil" is not correct in reference to the Moon because on the Earth, soil is defined as having organic content, whereas the Moon has none. However, standard usage among lunar scientists is to ignore that distinction.
　　The term lunar soil is often used interchangeably with "lunar regolith" but typically refers to only the finer fraction of regolith, that which is composed of grains one cm in diameter or less. Lunar dust generally connotes even finer materials than lunar soil.