Polyvinylamine
聚乙烯胺; 聚乙烯胺
🗣️ 情景例句
He was left in charge of the shop while the manager was away.
经理不在时他负责这个商店。
I'm certain he will be able to find the right place.
我肯定他会找到正确地点。
A barking dog doesn't bite!
吠犬不咬人。