Polyethylenamine
聚乙烯胺
🗣️ 情景例句
And me?
我呢？
What size shoes do you wear?
你穿的鞋子是什么尺寸的？
A man lived in a tall building in the city of Moscow. He liked living there.
有一个人住在莫斯科城的高楼里。 他喜欢住那儿。