单词：space propulsion reactor
单词：space propulsion reactor 相关文章
Visionary Ideas Could Transform Future NASA Missions NASA, the U.S. space agency, has awarded $3 million in grants for 30 proposals which explore new ideas for Americas next generation space program. The proposals reflect wide-ranging visions of new
VOA标准英语2011年(八月)
Hello! From the CNN Center here in Atlanta, Im Melissa Long on this Wednesday. Here is a look at some of the stories that are happening NOW IN THE NEWS this midday. The battle of the bailout just beginning. Federal Reserve Chairman Ben. Bernanke and
商业报道2008年(九)月
Well, Chernobyl had a single reactor that melted down and they have three. Plus, the fuel pool. So, it's been pretty clear all along that this was on par with Chernobyl. There have been 10,000 trillion disintegrations every second have been released
CNN2011年(四)月
Scientists Testing Space Propulsion by Light 科学家测试太阳能动力 Can the sun provide power for a spaceship to travel to the edge of our solar system? The answer may come from a small satellite. A Delta V rocket carried the satellite into s
2015年VOA慢速英语(六)月
NASA Working Toward Mission to Mars The head of the National Aeronautics and Space Administration, or NASA, said that the space agency is on track to land people on Mars in the 2030s. Charles Bolden is the administrator for NASA. He said that five ye
2015年VOA慢速英语(五)月
SCOTT SIMON, HOST: There's only so much space on a spacecraft, which means limited space for food and water. American crews on the International Space Station recycle their own sweat and urine to produce fresh drinking water - bottoms up. Now new res
2018年NPR美国国家公共电台2月