弹弓效应：这个名词其实是由太空船而来的，在赛车界也有。同样在球类运动中也有。“弹弓效应”本来是一个物理名词，指的是小天体或航天飞行器借助于大质量天体的重力来获得更大的动能，后来这个概念被推广开来就是借助外界条件来让自己获得加速度的意思。
弹弓效应用于加速飞船在星际间飞行。
The slingshot effect is used to accelerate a spacecraft in a planetary flyby.
“你可以来个漂亮的转身，”施密特说，让飞船以摇摆的姿势穿过星际重力区，然后利用反向的“弹弓效应”帮助减速。
"You're going to be going at a pretty good clip," Schmidt says, and the ship could maybe swing through the stars' gravity Wells in a kind of reverse slingshot effect to help decelerate.
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