Dialkene
二烯烃
🗣️ 情景例句
I have one ten-day tour that is still available. It will depart from New York on Dec. 24.
我们一个10天的旅行团还有空位，12月24号离开纽约。
Frightened to death.
吓死人了。
Can't they be mended?
不能修补了吗？