单词：carbon-producing
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1. 欧洲人、美国人是非常喜欢那种interactive的人的，你不需要太拘谨，不需要什么都yes。 2.在两个人对话的时候，适当的时候要称呼对方。假如你在对话中经常称呼对方，对方也会称呼你，这样
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[00:00.00]Exercise 2.1 [00:05.41]So,tell me about your trip to Egypt. [00:08.71]How high are the pyramids [00:11.03]They are huge! [00:13.06]One of them-the Great Pyramid of Khufu- [00:16.74]is 137 meters high. [00:19.97]How far are the pyramids from
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This is Scientific American's 60-Second Science, I'm Christie Nicholson. Got a minute? During the last ice age our problem was too little carbon. Unlike today where too much carbon is causing global warming. Past glacial ages occurred partly because
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By Bill Rodgers Washington 19 May 2008 The Green Revolution is a good example of how technological advances can have a dramatic effect on economic development - in this case on food production. Other technological innovations are helping to improve a
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Why Didn't Earth Freeze Completely? Research published in the July 2 issue of Nature reveals one reason our planet didn't succumb to an enveloping ice sheet during glacial ages. Christie Nicholson reports. [The following is an exact transcript of th
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1. 欧洲人、美国人是非常喜欢那种interactive的人的，你不需要太拘谨，不需要什么都yes。 2.在两个人对话的时候，适当的时候要称呼对方。假如你在对话中经常称呼对方，对方也会称呼你，这样
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