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

what Matt would have done?" "How do you know "Now you're setting up a date with a vampire! What do you have, a death wish?"

VOA: special.2010.01.20

And I think you will wish you are continuing to make the investment in time. If you are down here, what I want you to do is talk to somebody.

我想你希望再接再厉,保持花在这么门课上的时间，如果你退步了，我要你做的就是和某人交谈。

麻省理工公开课 - 固态化学导论课程节选

What I mean is when you wish to express that you are sorry if you've done something wrong

在这里我是指，你想要表达的是，如果你确实有过失，你感到很抱歉，

I'm sorry 课堂 - SpeakingMax英语口语达人

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