A typical orbit of lunar probe includes earth parking orbit segment, earth-moon transfer orbit segment, lunar satellite orbit segment and moon-landing orbit segment.

典型的月球探测器飞行轨道包括地球停泊轨道段、地月转移轨道段、月球卫星轨道段和着月轨道段。

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The flight trajectories from low earth parking orbit (LEO) to low lunar parking orbit (LLO) based on a planar three-body model are studied.

进行了基于平面三体模型的登月飞行器轨道控制方法的研究；研究了从近地低轨道到近月低轨道的飞行轨道；

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The ways to deal with the threat include simply flying a spacecraft into an errant asteroid or either attaching one to it or parking one alongside it, like a gravity tractor, to pull it into another orbit.

CNN: Space's threat to civilization