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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。
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History and Technology
History and Theory
History and Theory of Fine Arts
History and Theory of Min Opera
History and Theory of Puxian Opera
History Book about Nan Zhao in Tang Dynasty
History Department of Si Ku Quan Shu'Total Catalogue
History Department of Sui Shu'Record of Classics
History Drought in China
history education in museums
history effect
History Events of Ming Dynasty in Their Historical Entirety
history for making wheel hub
history for manufacturing wheel
history form below
History: Its Theory and Practice
History Journals
History Materials of Chinese Music and Dance
history museum
History Museum of Armenia
History Museum of Daqing Oilfield
history of abalone culture in China
history of Academic organizations in mechanical engineering
History of Academic School
history of Acquired Immune Deficiency Syndrome
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