地球外重力位
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external potential of earth
大地的外电位
以上为机器翻译结果，长、整句建议使用 人工翻译 。
In collaboration with other external organizations, one of the program's key goals is to search and hopefully mitigate potential NEO impacts on Earth.
ENGADGET: PSA: Asteroid 2012 DA14 will pass the Earth at 2:00pm ET Alt
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