Polyvinylamine
聚乙烯胺; 聚乙烯胺
🗣️ 情景例句
You may be offered coffee, and then you should immediately announce the reason for your visit.
他们会给你冲咖啡，然后你应该尽快说明来意。
The machines will be made of the best materials and the stipulations of the contract be strictly observed.
机器将用最好的材料生产，合同的规定也将得以严格履行。
That was used for drinking, said Wei Hua.
“那是饮用东西的用具。”魏华说。