单词：
单词： 相关文章
A new airplane may soon be able to travel into space at more than five times the speed of sound. The Defense Advanced Research Projects Agency, or DARPA, announced last Wednesday that a project by the aerospace company Boeing was making progress. DAR
2017年VOA慢速英语(五)月
This is Scientific American's 60-Second Science, I'm Cynthia Graber. This'll just take a minute. Its often said we know more about the moon than we do about the depths of the ocean. There is a lot we dont know about the H2O that covers much of the pl
Scientific American(五)月
Scientists Create New Maps of Ocean Floor 科学家绘制新的海底地图 Until recently, scientists had mapped only about 20 percent of the sea floor. But our knowledge of the deep seas is changing because of information from satellites. Scientist
2014年VOA慢速英语(十)月
Geophysicist Probes Ocean's Secrets Today, Pitman is a distinguished professor of geophysics at Columbia University, and the recipient of many of his fields most coveted honors. Even though he is now in his 80s, Pitmans animated manner makes it easy
VOA标准英语2012年(一月)
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)
WASHINGTON, May 17 (Xinhua) -- The U.S. National Aeronautics and Space Administration (NASA) announced Tuesday that the international Aquarius/SAC-D observatory will be launched on June 9, to study interactions between ocean circulation(循环) , the
英语新闻