Qac
abbr. quaternary ammonium compound 季铵化合物（杀菌剂）
🗣️ 情景例句
I know he will love the new photographs for your book.
我相信他会喜欢你为你的书所拍的这些新照片。
He has gone to America.
他去美国了。[动作结束后的结果持续至今]
It's quite likely that a decision will be made before the end of the year.
有可能年底前就要作出决定。