Nitronium
硝离子
🗣️ 情景例句
I'd like to introduce you to some of my friends.
我想介绍你认识一些我的朋友。
What does he do?
他是干什么的？
As his flat is in a large town, he has no garden of his own.
他住在大城市里的一所公寓里，没有自己的花园。