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Also: A question from Brazil about the composer and band leader John Philip Sousa. His music is popular on the Fourth of July -- America's Independence Day. Transcript of radio broadcast: 03 July 2008 HOST: Welcome to AMERICAN MOSAIC in VOA Special

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This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Common batteries are electrochemical cells. And they may get better thanks to living cells: the multicellular organism called brown algae. Lithium ion

发表于:2019-01-08 / 阅读(79) / 评论(0)

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absolute symmetrical dimension system