The slingshot effect is used to accelerate a spacecraft in a planetary flyby.

弹弓效应用于加速飞船在星际间飞行。

youdao

"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.

“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。

youdao

The gravitational field around Mars would have a slingshot effect on a spacecraft, hurling it back toward earth with additional velocity.

WSJ: First Space Tourist to Outline Trip to Mars