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理学
〔月球空间探测〕
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Ranger
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美国在20世纪60年代发射的系列探测器,于1961至1965年间陆续发射,共9架,目的是测试论证深空探测的必要技术,同时拍摄月球的近距离高清晰度影像,并最终完成月面硬着陆。
Astronomy
Ranger
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Directorate of Astronomy and Calendar
Directorate of Waterways
direct orbit
director-choreographers in integrated musicals
director circle
director cone
director curve
direct organogenesis
director-general of grain transport
director-general of the Grand Canal
director hammer percussion
direct orientation
director of a bureau
Director of Archery Storehouse
Director of Dragon
director of editorial department
director of general affairs
director of imperial observatory
director of teaching and learning
Director of the Highest Rank
Director of the Imperial Library
director of the outer scene
director plane
direct or reversecirculation rotary drill
directors and officers liability insurance
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