Qacs
(qac 的复数) abbr. quaternary ammonium compound 季铵化合物（杀菌剂）
🗣️ 情景例句
You're going to be a great success.
你会获得很大的成功的。
It's not too heavy,but I don't know the exact weight.
它不是太重的，但是我不知道准确的重量。
Yes, and full payment is due within 30 days.
是的，如果在30天骨付款就没有折扣。