Polyvinylamine
聚乙烯胺; 聚乙烯胺
🗣️ 情景例句
Thank you.
谢谢。
Many surfaces feel very different.
表面的触感会因物体而大有不同。
The disadvantage with carrying out interviews is that it may take a long time.
走访用户的不利之处是它需要很长的时间。