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NASA is developing a series of robotic probes that will get the most bang from a buck.
出自-2013年12月阅读原文
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The new National Institute of Food and Agriculture won't fund it, the National Institutes of Health won't fund it, and the NASA funded it only briefly, Mironov said.
出自-2012年6月听力原文
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It has been drastically cut by NASA
出自-2012年6月听力原文
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But they can attain more distant orbits; NASA plans for most of its future Earth-escaping payloads to the moon and Mars especially to carry CubeSats.
2019年6月六级真题（第三套）阅读 Section B
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Journalist Sarah Scoles reports that NASA currently tracks about 24,000 objects in space, and in 2016 the air Force had to issue 3,995,874 warnings to satellite owners alerting them to a potential nearby threat from another satellite or bit of debris.
2019年6月六级真题（第二套）阅读 Section C
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since then, NASA, the National Reconnaissance Office and even Boeing have all launched and operated CubeSats.
2019年6月六级真题（第三套）阅读 Section B