Qacs
(qac 的复数) abbr. quaternary ammonium compound 季铵化合物（杀菌剂）
🗣️ 情景例句
You said you have family in New York.
你说你在纽约有亲人。
If you have something to say…say it!
有话快说。
Here's my signature.
我签好了。