Polyethylenamine
聚乙烯胺
🗣️ 情景例句
Forgive my ignorance, But what exactly are you talking about?
请原谅我的孤陋寡闻，你说的到底是什么？
Is there anything I can explain fully?
有什么事情要我详细说明的吗？
The same policeman was just walking slowly past the entrance, when Patrick asked the same question.
昨天的那位警察正从门口慢慢走过，帕特里克上前问了和昨天同样的问题。