Azoamines
[机] 偶氨氨类
🗣️ 情景例句
Do you know that I mean?
知道我的意思吗？
How long have you had it?
你得这病多久了？
It was not long before a helicopter arrived on the scene to rescue the survivors of the plane crash.
不久，一架直升飞机飞抵飞机失事现场，来搭救这几个幸存者。