That's it for now, but if I get any news I'll let you know.

现在就这些，如果再得到消息，我就通知你。

《牛津词典》

When they arrive, I'll let you know at once.

当他们到达时，我会马上通知你。

youdao

Thanks very much, I'll let you know.

非常感谢，我会告诉你的。

youdao

The other thing I want to let you know is that instead of having a new problem-set that you'll be assigned this Friday, what we'll do instead is we'll give you some practice problems, and these will be just more of the same type of problems that you saw before but that's another chance to try them out more.

另外一件我想要告诉大家的是,这周五将不会像往常一样,给大家布置新的作业,而是给你们一些练习题，这些题目只是另一些跟原来同样类型的习题,你们应该都已经见过类似的,但这是尝试再次解决这类题目的机会。

麻省理工公开课 - 化学原理课程节选

If I spot a squirrel between here and the hotel, I'll let you know.

BBC: Is Carwyn out-foxing Plaid's USP?

"I'll let you know in a year if we're going to be north or south of 17 seats, " he said.

WSJ: House Democrats recruiting moderates for '14 bids

As soon as I discover it, I'll let you know.

CNN: MISSION CRITICAL