Qacs
(qac 的复数) abbr. quaternary ammonium compound 季铵化合物（杀菌剂）
🗣️ 情景例句
Tomorrow. Harry has an account to work on today.
明天。Harry今天有项会计工作要做。
The child is father of the man.
三岁定到老。
I think we need to discuss the fifth clause.
我想第5条需要讨论一下。