Chemene
季铵化合物
🗣️ 情景例句
Oh, this is amazing! How can you people handle so many festivals?
哇，不是吧！你们怎么可能应付这么多的节日？
What's the size of your shoes?
你的鞋多大尺寸？
Neither of us spoke during the journey.
旅途中我们谁也没讲话。