Polymine
聚乙烯亚胺; 聚乙烯亚胺
🗣️ 情景例句
And you said ... ?
那你怎么说的？
A good book is a best friend who never turns his back upon us.
一本好书，莫逆之交。
Do you think there is something wrong with the contract?
你认为合同有问题吗？