Be careful what you wish for. You might get it!

留意你所期盼的。你可能会得到它！

《柯林斯英汉双解大词典》

But be careful what you wish for.

但小心别许错了愿。

youdao

BE CAREFUL what you wish for: you may get it.

小心许愿：有可能想什么来什么。

youdao

If Republicans are hoping budget battles will further weaken Obama, be careful what you wish for.

FORBES: Obama's Low Poll Numbers No Solace for Detractors

The lesson from history, it seems, is this - when it comes to noise, be careful what you wish for.

BBC: The dark side of silence

Or, be careful what you wish for, you just might get it.

FORBES: Social Media Marketing: Be Careful What You Wish For, You Just May Get It