Qac
abbr. quaternary ammonium compound 季铵化合物（杀菌剂）
🗣️ 情景例句
I got the first round.
第一轮我请的客。
Do you think it fits OK?
你看合身吗？
Tell Mary we'll be late for dinner this evening.
你告诉玛丽，今晚吃饭将晚到一会儿。