“planetary protection”的概念、定义、翻译、参考文献-科学参考

单词	planetary protection
释义	planetary protection Encyclopedia 工学行星探测释 planetary protection行星保护正向污染行星保护和逆向污染行星保护的统称。在深空探测活动中，确保地球上的生命和物质不污染地外天体，从而避免干扰或误导后续针对生命起源开展的科学探测；同时，还应避免外太空的生命及相关物质危及地球生物圈。
随便看	Four Scrolls of Flower-and-bird Paintings four seas Four seasons centre for the Performing Arts Four-Season School four seasons clothing four seasons in China four seasons pasture four seasons production ditties Four Short Folk Songs of Northern Dynasties four-side greening four-six style parallel prose four skills and five means four-spiral semigroup four-spirit pattern foursquare foursquare identity foursquare theorem four-stage model of a crisis lifecycle four stage model of coordination conflict four-step rule four-steps-method Four Steps toward Modern Art four stranded parallel structure Four-stringed beard of Bouyei nationality four stringed instrument of Primi nationality

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