This kind of periodic orbit is only a phase in a comet's life.
这种周期性轨道只是彗星生命中的一个阶段。
University of The Times, Xiao Dai found a life of its own orbit.
大学时代，小呆找到了自己的人生轨道。
It is various life orbit that can not be observe clearly before the event happen, but after.
事前看不清楚，事后可以大致看清的人生轨迹。
The penetrating cranio-orbit dangerous to the sight and life is rare but very serious.
眼眶颅内异物穿通伤是一种危及视器官和生命的严重、少见的外伤。
This paper investigates the orbit maintenance of long life satellites.
本文研究近地轨道卫星长期在轨运行的轨道维持问题。
This paper investigates the orbit maintenance of long life satellites.
本文研究近地轨道卫星长期在轨运行的轨道维持问题。
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