Qac
abbr. quaternary ammonium compound 季铵化合物（杀菌剂）
🗣️ 情景例句
I need some help.
我需要帮助。
Love grows with obstacles.
磨折越多，爱情越深。
Dan Robinson has been worried all week.
丹。鲁宾逊焦虑了整整一个星期。