Hexamethylenediamire
己烯二胺
🗣️ 情景例句
Mom, that would be terrific!
那太棒了，妈！
My sister worked as a secretary before she got married.
在她结婚了以前，我的姐姐为一位秘书。
No, we are not.We are Danish.
不，我们不是瑞典人。我们是丹麦人。