单词：space ground equipment
单词：space ground equipment 相关文章
04 美国的航空航天技术 DATE=2-21-01 TITLE=EXPLORATIONS #1940 - Space Digest BYLINE=Paul Thompson VOICE ONE: This is Steve Ember. VOICE TWO: And this is Shirley Griffith with the VOA Special En
科技之光
Ground - Connecting the Earth to electrical equipment with a conductor. This is done so current overloads (perhaps due to a lightning strike) can be safely diverted to the Earth. Ground Fault Circuit
电信英语
But personal DNA machines can also save human lives. 但个人DNA检测器还可以挽救人类的生命。 Professor Ian Goodfellow is a virologist at the University of Cambridge. Ian Goodfellow教授是剑桥大学的病毒学家。 And last year h
TED演讲科技篇
By Brian Wagner Miami 07 November 2007 The crew of the space shuttle Discovery has returned to Earth after completing a more than two-week mission to the International Space Station. VOA's Brian Wagner reports that the astronauts performed crucial co
VOA常速英语2007年（十一月）
When people don't feel well, they go to see the doctor and take medicine. Though astronauts may also face health problems in space, both physically and mentally, how do they go about finding medical treatment? And what do they do to improve their hea
世界各地新闻集锦
As part of the plan, the latest step will be the launch of the second space lab, the Tiangong-2, which is scheduled for the third quarter of this year. Shortly afterward, the Shenzhou-11 spacecraft is due to carry two astronauts to dock with the lab
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