单词：space of discission
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This is Mars on Earth, a station that was built to help us learn how to live on the red planet. A group of explorers and NASA scientists are spending the next two weeks inside this habitat, trying to figure out how people will live on Mars. The NASA
自然百科2008年
VOICE ONE: I'm Shirley Griffith. VOICE TWO: And I'm Steve Ember with EXPLORATIONS in VOA Special English. Today we tell about the flights that followed Apollo Eleven to the moon. (MUSIC) VOICE ONE: The summer of nineteen sixty-nine was a special tim
VOA慢速英语2009年（七）月
Atlantis Crew Ready for Final Shuttle Mission The end of an era is near. The U.S. space shuttles - the complex workhorses of the U.S. space program - are being retired so NASA can focus on developing spacecraft that can travel beyond low-Earth-orbit.
VOA标准英语2011年(七月)
As Discovery begins its 39th and final mission into Earth's orbit Thursday, America's 30-year space shuttle program comes one step closer to its scheduled end this April. The aging fleet of reusable spacecraft has become an American technology icon,
VOA标准英语2011年(二月)
Atlantis Crew 'Honored' to Be On Final Shuttle Mission The space shuttle Atlantis is preparing for the final mission of the U.S. shuttle program next month. Atlantis's crew is excited and reflective before the space craft's last flight. The crew, led
VOA标准英语2011年(六月)
As the world observes the 40th anniversary of the historic moon landing on July 20, 1969, the U.S. agency that accomplished that feat is working on plans for a return to the moon and an even more ambitious plan to use the moon as a base for missions
VOA标准英语2009年(七月)