Tetranitrocompound
四硝基化合物
🗣️ 情景例句
I hear the exams will be very tough.
我听说考试挺难的。
He devoted his life to promoting world peace.
他一生致力于促进世界和平。
Some of this heat near the earth's surfact is used to make electricity.
靠近地表的一部分热量已被用来发电。