Qacs
(qac 的复数) abbr. quaternary ammonium compound 季铵化合物（杀菌剂）
🗣️ 情景例句
How about guests?
来宾呢？
Don't mention it.
不用谢。
To varying degrees, we all have secrets which we do not want even our closest friends to learn,
尽管我们人人都有各种大小秘密。连最亲密的朋友都不愿让他们知道，