Diazoamine
[机] 重氮氨
🗣️ 情景例句
No such thing as too many at an opening.
展览开幕怎么会嫌人太多呢。
This is my fourth year of college, I'm a senior.
这是我上大学的第四年，我是四年级学生。
Who is he?
他是谁？