叶沸石

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This is Scientific American's 60 Second Science. I'm Steve Mirsky, got a minute? The Meridiana Planum region of Mars once had water that was really soft and highly acidic, conditions in incredibly hostile to any life forms that we know about. So any

发表于:2018-12-24 / 阅读(55) / 评论(0)

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26After the plague the Lord said to Moses and Eleazar son of Aaron, the priest, 2Take a census of the whole Israelite community by families-all those twenty years old or more who are able to serve in the army of Israel. 3So on the plains of Moab by t

发表于:2018-12-30 / 阅读(65) / 评论(0)

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2006年VOA标准英语-US Company Builds Large High-Flying Balloon to

By Mike O'Sullivan Palmdale, California 06 September 2006 Engineers in the California desert are testing a new communications platform that blends modern electronics with old technology. Developers say a helium-filled balloon carrying high-tech equi

发表于:2019-02-07 / 阅读(110) / 评论(0)

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经济学人:自由交流:丰厚的回报(1)

Finance and Economics 财经 Free Exchange: Many happy returns 自由交流：丰厚回报 A new data trove helps reshape how the economy is understood. 新的数据宝藏有助于重塑经济体被如何理解。 Data-gathering is the least sexy par

发表于:2019-02-17 / 阅读(42) / 评论(0)

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Topics: Preventing Violence in Schools Post Columbine; American Territories: U.S. Virgin Islands; although versus even though; lite; rate versus rank Words: campus massacre outcast bullied minor to claim clique to retaliate Caribbean inhabitant exoti

发表于:2019-02-23 / 阅读(57) / 评论(0)

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万物简史第306期:地下的烈火(14)

Because we can't see into the Earth, we have to use other techniques, which mostly involve reading waves as they travel through the interior. 我们无法看到地球的深处，因此不得不使用别的方法，主要包括观察波在地球内部的

发表于:2019-02-25 / 阅读(60) / 评论(0)

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accelerometer calibrator

actual man-days at work

autoecious allochthonous deposition