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1·One characteristics of selenodesy is that most of its observation data comes from the space detectors or the satellites flying around or by the moon.

月球大地测量的一个特点是它的观测数据绝大部分都要依靠航天探测器或环月、绕月卫星来获取。

2·One of the characteristics of selenodesy is that most of its observation data of comes from the space probes or the satellites flying around or by the moon.

月球大地测量的一个特点是它的观测数据绝大部分都要依靠航天探测器或环月、绕月卫星来获取。