Enough is enough 够了，适可而止

enough意为“足够的，充足的”，两个enough放在一起，表达的意思更强了，意为“

够了;适可而止;停”

例句：

Stop asking for money! Enough is enough!

别要钱了。适可而止吧。

I've heard all the complaining from you that I can take. Enough is enough!

我已经听了能采纳的你抱怨的所有事。别再说了。