Tetranitro
四硝基
🗣️ 情景例句
A year is really a short time, and later you will be glad you postponed getting married.
一年其实是很短的，过后你将会为你推迟了婚期而感到高兴的。
My mother mailed me a parcel.
我妈给我寄了一个包裹。
That's very nice of you.
既然这样，那就多谢了。