中文说明：卫星返回地球的运动轨线示意图，做成动画，看着有动感。
English Description：
The satellite returns to the earth's motion trajectory schematic diagram, makes the animation, looks has the movement.
Schematic diagram of the orbit of satellite returning to earth
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中文说明：卫星返回地球的运动轨线示意图，做成动画，看着有动感。
English Description：
The satellite returns to the earth's motion trajectory schematic diagram, makes the animation, looks has the movement.