Polyethylenamine
聚乙烯胺
🗣️ 情景例句
Should children be allowed to watch violent movies?
小孩可以看暴力片吗？
He looks gay.
他神气活现。
Half past four. Don't forget to tell Jim. I hope he can come too.
4：30。别忘记告诉吉姆。我希望他也能来。