In this picture, the Earth-moon system actually appears to be a double planet.
照片中，地月系统实际上看上去像一颗双行星。
As the Givin developed intellectually, they perfected complex forms of mathematics to help predict the bizarre moon system orbiting Yag'Dhul.
随着吉文人高度智慧化，他们完成了形式复杂的数学体系，以预测亚格杜尔星轨道上奇异的卫星系运动。
The Earth-Moon system has always been perplexing.
地月系统一直令人困惑。
Then on the basis of invariant manifold theory and Poincaré section, a transfer trajetory between L1 and L2 of the Earth-Moon system was given.
然后基于不变流形理论和庞加莱截面方法，设计了不同拉格朗日点间转移轨道。
Finally, the implications of tidal rhythmites for the Earth's rotation and the history of the Earth-Moon system in geological past are concluded.
最后，对潮汐韵律层在推测地史时期地-月系的演化历史中的意义作了评述。
The dynamics of the Earth-Moon system is quite different from the Sun-Earth system especially after a long duration for the gravitational attraction of the Sun.
由于在地-月系统中太阳的引力不可忽略，特别是在长时间作用以后，其动力学行为与摄动力较小的日-地系统有明显的不同。
The dynamics of the Earth-Moon system is quite different from the Sun-Earth system especially after a long duration for the gravitational attraction of the Sun.
由于在地-月系统中太阳的引力不可忽略，特别是在长时间作用以后，其动力学行为与摄动力较小的日-地系统有明显的不同。
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