地月系

显而易见，当选取月球的一些物理参数时，应考虑到地月系经历了潮汐演化这一事实。

Apparently , when we select some physical parameters of the Moon , it is necessary to consider the fact that the Earth-Moon system has been undergoing the tidal evolution .

在研究地月系加速中应用中国古代日食记录的某些问题

Some problems about the application of the Chinese ancient eclipses records for the investigation of the Earth-Moon system secular acceleration

这个观点认为，从宇宙总体系银河系太阳系地月系地球各圈层，乃至分子，原子，都属不同的层次。

The systematology predicts that , from universal system as a whole , including Galaxy , solar system , earth-moon system and all layers of the earth , even to moleculars and atoms , they are all belong to different layers .

地&月系共线平动点L2相对地球和月球不变的空间位置使得它在月球背面探测任务中起着十分重要的作用。

The collinear libration point L2 of the earth-moon system plays an important role in exploration of the back of the moon for its relatively fixed position with respect to the earth and the moon .

探测器定点在日&地+月系三角平动点附近的轨道控制

Station-Keeping of Spacecrafts around the Equilateral Equilibrium Points in the Sun-Earth + Moon System

日-地（月）系拉格朗日L1点及晕（Halo）轨道应用

Application of Lagrange L1 Point and Halo Orbits in Sun-Earth ( Moon ) System

深空探测器需要定位在日-地（月）系的共线平动点L1或L2附近执行探测任务，但由于共线平动点的不稳定性，必须在运行期间进行轨控。

Deep space explorers should be positioned around collinear libration points L_1 or L_2 of the Sun-Earth ( Moon ) system to carry out exploration missions . Due to instability of collinear libration points , station-keeping must be implemented during operation to achieve this .