Polycations
(polycation 的复数) 聚阳离子
🗣️ 情景例句
I speak fairly good English and I enjoy meeting different kinds of people.
我的英语讲得很流利，而且我喜欢接触不同的人。
John has built up his own business.He owns a hotel.
约翰建立了他自己的生意，他拥有一家宾馆。
What's the number of your car?
您的汽车牌号是多少？