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〔月球空间探测〕
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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。
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Ranger
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almost metric space
almost negative formula
almost nilpotent endomorphism
almost nilpotent group
almost normal formula
almost normal subgroup
almost open
almost open mapping
almost open set
almost orthogonal eigenvectors
almost parallelizable manifold
almost perfect number
almost-period
almost periodic
almost periodic analytic function
almost periodic compactification
almost periodic differential equation
almost periodic dynamical system
almost periodic flow
almost periodic function
almost periodic function on a group
almost periodicity
almost periodic motion
almost periodic oscillation
almost periodic point
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