单词：bronchoalveolar lavage fluid
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Do you need eight glasses of water everyday? Tring to do the right thing by drinking eight full glasses of water everyday may do little more than making a person run to the bathroom, a researcher said. Newspaper articles, health and beauty magazines
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This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. In theory, scientists could learn a lot about our health by testing tiny amounts of bodily fluidsa drop of blood, a tear, a bead of sweat. But somethin
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flow vi.流，流动 flower n.花，花卉；开花 flu n.流行性感冒 fluctuate vi.波动 vt.使波动 fluent a.流利的，流畅的 fluid n.流体，液体 flush n.兴奋，脸红；发烧 flute
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Can it really be sixty-two years ago that I first saw you? 我们初次相遇，难道真的是六十二年前吗？ It is truly a lifetime, I know. But as I gaze into your eyes now, it seems like only yesterday that I first saw you, in that small ca
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My friend Sarah is a vet. I have asked her to tell us about a typical days work. I am a veterinary surgeon and work for a charity called PDSA, which stands for the Peoples Dispensary for Sick Animals. We treat pets belonging to people who are on stat
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