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VOA标准英语2012--Ice Age Melt Offers Future Climate Clues

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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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I dont know how people understand physics. I think its a fascinating subject and really wish I understood more. Physics seems to explain everything about our world and our universe. Its as though physics is the key to unlocking all of our worlds myst

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