Polyvinylamine
聚乙烯胺; 聚乙烯胺
🗣️ 情景例句
Hmm. I can't remember.
嗯， 我记不起来了。
He hesitated at nothing.
他对任何事都不会犹豫不决。
Perhaps it is the desire for solitude or the chance of making an unexpected discovery that lures people down to the depths of the earth.
寻求独处的愿望或寻求意外发现的机会的欲望吸引人们来到地下深处。