"将计就计"用英语怎么说?

beat sb. at their own game 将计就计战胜某人；以其人之道还治其人之身

If you beat someone at their own game, you use the same methods that they have used, but more successfully, so that you gain an advantage over them.

• He must anticipate↗/ the maneuvers of the other lawyers / and beat them at their own game.↘ 
 他必须对其他律师的策略有所准备，从而将计就计战胜他们。

be game for... 敢于尝试...

If you are game for something, you are willing to do something new, unusual, or risky.

• He said / he's game for a similar challenge↗/ next year. ↘ 
 他说明年他敢尝试一次类似的挑战。

fun and games 欢乐的事情

• I think↗/ he was surprised↗/ that the new job wasn't all fun and games. ↘ 

我觉得他有点吃惊这份新工作并不是那么有趣。