英语词汇“gravity assist”是什么意思，“gravity assist”的读音、用法及例句翻译-烛光网

词汇	gravity assist
释义	gravity assistn.（名词） The use of the energy obtained from a gravitational field to change the speed or shape of a spacecraft's orbit.重力协航：利用来自于万有引力场的能量以改变宇宙飞船运行轨道的速度或形状
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