Acetylenedinitrile
乙炔二氰, 丁炔二腈
🗣️ 情景例句
It was such a great idea to spend the weekend this way.
这样过周末的主意简直太棒了。
Are you living in a dorm this term?
本学期你是住在学校宿舍吗？
I had a letter from my sister yesterday.
昨天我收到了姐姐的一封信，