Enough is enough意为够了，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”。
双语例句：
1.Stop asking for money! Enough is enough!
别要钱了！适可而止吧！
2.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。
3.Stop asking questions! You should know when enough is enough.
别问问题了！你应该知道什么时候该适可而止。
4.I don't mind good, clean fun, but enough is enough.
我并不介意有趣 、 健康的玩笑，但要适可而止。
5.It's time to wise up and tell those around you that enough is enough.
现在该觉醒了，告诉你周围的人要适可而止。
6.There is enough power to run up to four lights.
电力足够带起4盏灯。
7.That is enough to pay the start-up costs for fourteen research projects.
那足够用来支付14个科研项目的启动费用了。
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