单词：oscilloscope tubes with a long persistence
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This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute? Asbestos increases the risk for certain cancers. The fibers are thought to do so by skewering cells, setting off chemical reactions that lead to inflammation,
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85 新功效的抗生素在加州诞生 DATE=8-15-01 TITLE=SCIENCE REPORT - Designer Antibiotics BYLINE=Jerilyn Watson （Start at 1'04
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This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Solar cells convert sunlight to electricity. But they don't take advantage of all that solar heat, thereby missing out on the majority of the solar ene
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1. You will receive a body. 关爱自己，受益无限。 You may like it or hate it, but it will be yours for as long as you live. How you take care of it or fail to take care of it can make an enormous difference in the quality of your life. 无论喜
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If, on the other hand, you start working the day I give you the midterm, you'll be frustrated. 或者，另一方面，如果你只是在我们期中考试那天才开始复习，那么你一定会感到很失落。 You'll come to me and say, 'It's i
异类:不一样的成功启示录