我能听到一只苍蝇在我耳边嗡嗡作响。

I could hear the ___buzz of a fly near my ear.

我正在工作时，开始听到一种嗡嗡声，声音越来越大。

I was working when I started hearing a kind of ___buzz, that was getting louder and louder.

冰箱持续的嗡嗡声很烦人。

The constant ___buzz of the refrigerator was annoying.