Qac
abbr. quaternary ammonium compound 季铵化合物（杀菌剂）
🗣️ 情景例句
Aren't you hungry, Harry?
你不饿吗， Harry？
He who fears to suffer, suffers from fear.
怕吃苦头的反因怕而吃苦头。
Hi, Carol!Where's Tom?
你好，卡罗尔！汤姆在哪儿？