Polyethyleneimine
聚乙烯亚胺
🗣️ 情景例句
Oh! Hi, Grandpa. Yes, of course, I am, but my mind isn't.
噢， 嗨， 爷爷。是的， 当然， 我准备好了， 但是有点心事。
Each bird loves to hear himself sing.
鸟儿都爱听自己唱歌。
The captain learnt from the letter that the name of the lost ship was the Karen.
从这封信中船长了解到沉船船名是“卡伦”号。