Qac
abbr. quaternary ammonium compound 季铵化合物（杀菌剂）
🗣️ 情景例句
Table tennis, I suppose. That's almost our national game. People from all walks play it.
我想应该是乒乓球吧。它几乎是全国性运动，各行各业的人都打。
I'll have mashed potatoes and green beans.
我要土豆泥和青豆。
I'm all set.
我都准备好了。