Qacs
(qac 的复数) abbr. quaternary ammonium compound 季铵化合物（杀菌剂）
🗣️ 情景例句
He makes a good living.
他过得很优裕。
I've got a pain in my neck.
我的脖子痛。
How about having lunch with me?
一起吃顿中饭怎样？