Polyethylenamine
聚乙烯胺
🗣️ 情景例句
We live with my parents, Dr. and Mrs. Philip Stewart.
我们和父母住在一起 ，我父母是Philip Stewart夫妇。
I think you probably know China has adopted a flexible policy in her foreign trade.
我想你也许已经了解到中国在对外贸易中采取了灵活的政策。
We're having a special showing next week in our showroom.
下周我们的展示室将有一个特别的展示会，