单词：earth-moon dynamics
单词：earth-moon dynamics 相关文章
The Sahel is one of driest areas in Africa, but that may change if Earths surface temperatures rise more than two degrees Celsius. 萨赫勒地区是非洲最干旱的地区之一，但是如果地球表面温度再升高两摄氏度，那么这一切可
2017年VOA慢速英语(七)月
PlummetingUSSatellitetoHitEarthFriday NASA launched the Upper Atmosphere Research Satellite (UARS) 20 years ago this month. And now that bus-sized satellite is plunging toward Earth. Mark Matney, an orbital debris scientist at NASA's Johnson Space Ce
VOA标准英语2011年(九月)
Space Shuttle's End Prompts Doubts About NASA's Future One day after the landing of Atlantis ended the 30-year space shuttle program, the company that ran shuttle operations for the U.S. space agency NASA is dismissing 1,510 employees. The end of the
VOA标准英语2011年(七月)
We may be going through a reversal now. 我们现在也许正经历一次逆转。 The Earth's magnetic field has diminished by perhaps as much as 6 percent in the last century alone. 仅仅在过去的一个世纪里，地球的磁场就减弱了大约
万物简史
No one can say what causes the oceans' chemistry to change so dramatically from time to time, but the opening and shutting of ocean ridges would be an obvious possible culprit. 谁也说不清什么原因导致了海洋化学成分不时发生戏剧性
万物简史
31. Although apparently rigid, bones exhibit a degree of elasticity that enables the skeleton to withstand considerable impact. 31. 骨头看起来是脆硬的，但它也有一定的弹性，使得骨骼
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