有/没回音

有/没回音:

Literally means:

have (no) echo or resound

Actually means:

回音 is echo or resound, and here means reply or response.

This phrase means that there is (no) reply or response to something or that the thing that somebody was asked to do has (no) result.

回音，被物体反射回来的声音，指答复。

有/没回音，表示某事有/没有答复，或让对方做的事情有/没有结果。