单词：moonorbiting satellite
单词：moonorbiting satellite 相关文章
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
By Paul Sisco Washington 19 March 2008 The planet Saturn has long fascinated astronomers because of its distinctive rings and multiple moons. NASA's Cassini spacecraft visited one of Saturn's moons last week, collecting samples, data and pictures of
VOA标准英语2008年（三月）
The amount of debris orbiting the Earth has reached a tipping point for collisions, which would in turn generate more of the debris that threatens astronauts and satellites, according to a US study released on Thursday。 NASA needs a new strategic p
实用英语
Galaxy 银河美国电视中继卫星 Galileo 伽利略美国木星探测器 Gals 航向前苏联国内军政通信卫星 Gambit 策略美国照相侦察卫星 Gamma 伽玛前苏联伽玛射线天文卫星
英文语法词汇
THE MAKING OF A NATION - American History: Man on the Moon STEVE EMBER: Welcome to THE MAKING OF A NATION American history in VOA Special English. I'm Steve Ember. (MUSIC AND SPUTNIK SOUNDS) On a cold October day in nineteen fifty-seven, the Soviet U
2012年VOA慢速英语(七)月
China plans to launch Chang'e-4 lunar probe to the dark side of the moon in 2018, as announced by China's State Administration of Science, Technology and Industry. Liu Jizhong, director of the lunar exploration program and space engineering center, s
2016CRI中国国际广播电台