Qac
abbr. quaternary ammonium compound 季铵化合物（杀菌剂）
🗣️ 情景例句
What's bugging you?
你正烦什么？
The fox is known by his brush.
狐狸只因尾巴大，所以人人认识他。
I don't want to hear it.
我不想听！