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This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Some people are worried that the more we learn about genetics, the closer well get to a day when we can choose all sorts of characteristics for our bab
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But I want to jump up to shallow water now and look at some creatures that are positively amazing. 不过我现在还是想说说浅水里的世界，来看看那些神奇的生物。 Cephalopods -- head-foots. As a kid I knew them as calamari, mostl
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That proposition was put to the test after Paul Volcker became Fed chairman in 1979. 这种主张在保罗沃克尔于1979年成为美联储主席后被付诸验证。 Mr Volcker was set on getting inflation down. 当时，沃克尔决心要把通胀降
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