单词：lost buoyancy method
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This is Scientific American's 60-Second Science. I am Adam Hamterture, got a minute? What's sixteen feet tall and 9,550 years old? Its the world's oldest tree. The worn and weathered spruce grows in Sweden's windswept tundra. But, until recently, wel
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Subject: Stop jerking my chain. 迷你对话 A: Daniel, wait a moment, please tell me more about the concert. Daniel, 等一下，请您再多讲些演唱会的事情给我听听吧。 B: Stop jerking my chain. OK? Im working now. 不要再烦我了，
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