如果你听到什么消息，请告诉我。

Let me know if you hear anything.

youdao

你知道的事，我也要知道。如果你听到什么风声，你就要告诉我。

I need to know as much as you do. If you hear about something that might happen, then tell me about it.

youdao

如果你还没有听到打电话的人说了什么，更礼貌的说法是：“对不起。你能再说一遍吗？”而不是简单地说：“什么？”

If you have not heard what a caller said, it is much more polite to say "I'm sorry. Could you say this again, please?" than to simply say "What?"

youdao