生日派对上，孩子们轮流玩打地鼠游戏，看谁能打到最多的地鼠。

At the birthday party, kids took turns playing ___whac-a-mole, seeing who could hit the most moles.

解决这些投诉就像是打地鼠，刚处理完一个，另一个又冒出来了。

Dealing with these complaints is like playing ___whac-a-mole – as soon as you handle one, another pops up.