The children cut a caper in the yard.

孩子们在院子里兴高采烈地乱蹦乱跳。

The lambs were capering in the fields.

羊羔在地里欢快地跳跃。

I’d like to know what caper he is up to now.

我倒想知道他现在在玩什么鬼把戏了。