Quaterisation
季铵化反应
🗣️ 情景例句
I hear it from my patients.
我是从我的病人那儿听到这些的。
The dinner was wonderful.
晚餐棒极了。
'A new play is coming to The Globe soon,' I said.
“一出新剧要来‘环球剧场’上演了，”我说，