如果你不告诉他们，谁也不会察觉。

If you don't tell them, nobody will be any the wiser.

《牛津词典》

不过如果我告诉他们我要退出，他们会很失望的。

They would be so disappointed though if I told them I was quitting.

youdao

如果他们没有发现，我是不会告诉他们的。

I will not tell them until they find out.

youdao

If you talk to string theorists, they will tell you there are really, how many dimensions?

如果你和弦理论家交流,他们会告诉你到底有多少维度

耶鲁公开课 - 基础物理课程节选

It would be much nicer and easier,smoother, it would be much easier, if we could just cultivate children self-esteem telling them how wonderful they are.

这将让事情变得更简单，非常容易，如果我们要培养孩子自尊,告诉他们，他们有多棒。

哈佛公开课 - 幸福课课程节选

If that's for me, tell them I'm busy please.

如果那是找我的，请告诉他们我现在正忙着。

麻省理工公开课 - 热力学与动力学课程节选