Polycation
聚阳离子
🗣️ 情景例句
I wouldn't be surprised if your son goes to harvard.
我觉得你儿子很有希望上哈佛。
How many slices are you going to use?
你要用几片？
I'm sorry, but I don't have any with me now.
真抱歉，我现在身上没带。