单词：impact surface
单词：impact surface 相关文章
This is a genuine iron meteorite, this is believed to have once been part of the core of a long dead planet or asteroid, and this was found right here in this strewn field, this remarkable little shapes, indentations on the surface are called thumbpr
探索与发现2014年
(NASA Administrator Dan) Golden accepts that the search for life on Mars is not over.
寻访外星人
Yes,that's right,they've already seen in some parts of the wetlands here,the more remote islands that some of that sheen on top of the water is coming ashore and affecting some of the islands on the uttermost parts of wetlands.The real fear is that h
万花筒2010年
Using science as a guide, we attempt to recreate the final moments of the dinosaurs. 我们以科学为指引，试图重建恐龙的最后时刻。 The first effect was the impact itself. 第一个效果是撞击本身。 So when a 10-kilometer diam
侏罗纪搏击俱乐部
Last October, a NASA rocket, traveling at a speed of 9,000 kilometers per hour, smashed into a dark crater on the moon's south pole. Upon impact, the Centaur rocket kicked up a cloud of debris and elements from the moon's surface, creating a so-calle
VOA标准英语2010年(十)月
US Space Probe to Reveal Comet's Secrets 美国航天探测器揭示彗星状况 A U.S. spacecraft is completing afive-and-a-halfmonth voyage to a distant comet and could create celestial fireworks wh
VOA2005（下）--环境科学探索