大学英语精读第四册 Unit Three:Why Do We Believe That the Ear

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SSS 2009-01-01

This is Scientific American's 60-Second Science. I'm Steve Mirsky . Got a minute Happy New Year! And dont feel bad about taking today off. After all, youve traveled far. And Im not talking about the trip home from the party last night. According to N

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CNN 2010-10-03

Declassify US government documents and witness testimony from former or retired US military personnel confirm beyong any doubt the reality of ongoing UFO incursions at nuclear weapon sites. When I say UFO, the witnesses have described this craft as d

SSS 2009-01-14

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. When we think about how to represent sound visually, most of us probably picture those volume-dependent sine waves. But thats not how John Stuart Reid

SSS 2010-01-12

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At this point, about 4.5 billion years ago, an object the size of Mars crashed into Earth, blowing out enough material to form a companion sphere, the Moon. Within weeks, it is thought, the flung material had reassembled itself into a single clump, a

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Under this head I reckon a monster which, by the various names of Fin-Back, Tall-Spout, and Long-John, 在这个项目下,我不禁想起一种有着许多名称的巨兽来:脊鳍鲸,高喷鲸,长约翰鲸, has been seen almost in every sea and is c