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。

《新英汉大辞典》

It's time to say enough is enough.

是时候说应该适可而止了。

youdao

Tell the White House enough is enough.

告诉白宫，这一切已经够了。

youdao

Enough is enough,she says, the women of Guinea are tired of how the country is being ruled.

VOA: standard.2009.10.28

Yes. In fact, there is not enough energy in a single photon to go ahead and eject an electron from this zinc surface.

是的，事实上，这里的光子没有足够的能量,去从锌表面逐出一个电子。

麻省理工公开课 - 化学原理课程节选

That's funny. I mean, that's really cool. If someone is witty enough to do that, then it's awesome.

这确实很好笑，真的很酷！如果有人真的够诙谐能做出那种事，真的很棒！

街头艺术 - SpeakingMax英语口语达人

Would they dig in their heels and stay? would they say enough is enough?

CNN: One block, two tornadoes: Life in the crosshairs

And I personally will be making every effort to spread the message that ENOUGH IS ENOUGH.

FORBES: America's Burgeoning Class War Could Spell Opportunity For GOP

Automakers have been waiting for consumers to finally say enough is enough for their old rides.

FORBES: Fie on High Gas Prices -- February Car Sales Soar