Qac
abbr. quaternary ammonium compound 季铵化合物（杀菌剂）
🗣️ 情景例句
Do you have a plan?
有计划吗？
He has pamphlet.
他有一本小册子。
No wonder people say that computers are taking over the world.
难怪有人说电子计算机正渐渐接管世界。