Qac
abbr. quaternary ammonium compound 季铵化合物（杀菌剂）
🗣️ 情景例句
I hear they intend to marry.
我听说他们打算结婚。
He who purposes to be an author, should first be a student.
想当作家，相当学生。
I'll go to that shop and see if they have a telephone.
我去那个商店，看看是否有电话。