单词：polyacidic
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This is Scientific American's 60 Second Science. I'm Steve Mirsky, got a minute? The Meridiana Planum region of Mars once had water that was really soft and highly acidic, conditions in incredibly hostile to any life forms that we know about. So any
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抗病毒药 三氮核苷唑 Ribavirin` 病毒唑, 利巴韦林, 尼斯可, VIRAZOLE 无环鸟苷 Acyclovir 阿昔洛韦, Zovirax, 永信克疱, 丽珠克毒星, 舒维疗 更昔洛韦 Ganciclovir 丽科
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This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Landfills produce methanewhich can be valuable as an energy source. But scientists haven't known why landfills make so much methane. The solid waste in
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AUDIE CORNISH, HOST: This is what pillow talk on television sounds like these days. (SOUNDBITE OF TV SHOW, I LOVE DICK) KATHRYN HAHN: (As Chris) Why do you think that we are - have been monogamous all these years when we don't even believe in it? Lik
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如果你爱喝葡萄酒或经常遇到要喝葡萄酒的场合，学几句高大上的品酒英语尤其重要。 品葡萄酒本节课的重点词汇: 1) wine tasting 葡萄酒品酒会2) tasting flight 品酒序列3) Cabernet Sauvignon 赤霞珠4)
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Students at the University of Canterbury had only one and a half days of classes before the earthquake on Feb 22nd. The university then closed for three weeks. A number of buildings had red stickers, including the two newest buildings Commerce and La
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