Cationoid
类阳离子
🗣️ 情景例句
Is it all right if I use a letter of credit?
如果我使用信用证，没关系吧？
The petroleum region is centered largely in the north.
那里的石油区大部分集中在北部。
Let me take a look at your shoulder. Where does it hurt?
让我看看你的肩膀。哪里疼？