Tetranitrocarbazol
[化] 四硝基咔唑
🗣️ 情景例句
I've thought about that for some time.
我已经想过一阵子了。
Why are you so sad?
你为什么这样伤心？
On this occasion, however, it had slowed down considerably.
然而这一次它的速度慢多了。