Polyvinylamine
聚乙烯胺; 聚乙烯胺
🗣️ 情景例句
Of course, Harry. I want what's best for you,
当然， Harry。我要的是对你最有利的事,
I told him to stay for lunch.
我告诉他留下来吃午餐。
What are you doing?
你在干什么？