Tetranitrocompound
四硝基化合物
🗣️ 情景例句
That's not a hobby, you've just brought your work home with you!
那不是爱好，你只是把工作带回家而已。
Teaching others teaches yourself.
教学相长。
Yes, I think I have. Look at that book on the desk. Maybe it's yours.
是的，我想我看见了。请看桌子上的那本书。也许就是你的。