Polyazin
[医] 多氮化合物
🗣️ 情景例句
I'm so tired I think I'm overtired.
我好累， 我想我是累过头了。
Will you please call me back?
请你回我一个电话好吗？
Although we can't see these atoms, they really do exist.
虽然我们看不见原子，但它们的确存在。