Qac
abbr. quaternary ammonium compound 季铵化合物（杀菌剂）
🗣️ 情景例句
I never met before.
我从未谋面过的人。
It looks like it's going to be sunny.
今天看来像是个晴天。
When they had all made themselves comfortable, a stranger appeared.
当他们都已安排舒适时，一个陌生人出现了。