Tetranitrocompound
四硝基化合物
🗣️ 情景例句
It's nice to see you again.
再次见到你，真是太好了。
To scream for his breakfast
想吃早餐而大喊大叫。
In a few days I was learning and enjoying it like any child.
几天之后，我像一个孩子那样学习起来--而且学得很开心。