Taking the design of Venus gravity-assist trajectories as an example, the relation between orbital eccentricity and orbital inclination was analyzed.

以金星借力轨道设计为例，分析了轨道偏心率与轨道倾角增量之间的关系。

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All these spacecraft have used sling-shot style gravity assist maneuvers to increase their speeds through the outer solar system.

这些航天器全都使用了射弹弓式的引力辅助方法，从而在外太阳系中提高速度。

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NASA calls this a gravity assist, and exploits it to save fuel in missions to outer planets such as Jupiter and Saturn.

美国航空航天局称这是一个重力辅助，并利用它来节省执行去木星和土星等外行星的任务时消耗的燃料。

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