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SSS 2008-09-24

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SSS 2009-11-26

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(WA) One reason oceanographers analyze the sediment on the ocean floor is to see how long-terms changes in Earth's temperature have affected the depth of the ocean. By analyzing the remains of sea animals in old layers of ocean sediment, oceanograph

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SSS 2010-04-09

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[科学美国人60秒] SSS 2015-08-06

Microbe organize live in you ，on you ,in soil in clouds ,and below the ocean floor ,that last bags of single self.. is particularhard to study, not only the samples are difficult to obtain ,but they can easily be contaminated with all that other mi

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再别康桥英文版

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