Polyvinylamine
聚乙烯胺; 聚乙烯胺
🗣️ 情景例句
They all work hard, without exception.
他们个个努力工作，无一例外。
The poet creates pictures with words.
诗人用语言创造万物。
We welcome the seasons by the riverside,
我们在河边迎接一年四季。