表达 “the ball is in someone's court（球在某人那边的球场上）” 的意思是 “因为已经尽了最大努力，所以现在轮到此人对这件事情做出决定或采取行动”。

据说，这个表达源自网球运动，描述此刻轮到对手发球或回球，因为网球在对方的场地上，所以此时能左右比赛局势的是对手。

例句

I've done all I can on this project so the ball's in your court now to make it work.

我已经在这个项目上尽我所能，所以现在就指着你让它奏效了。

I've dropped enough hints to show how much I like him – the ball's in his court now to make the next move.

我已经给出了足够的暗示，表明我有多么喜欢他，下一步怎么做就看他的了。

I've helped you plan your assignment but the ball's in your court now to complete it.

我已经帮你计划了这项任务，而现在就轮到你把它完成了。