Diolefins
二烯属; 二烯属烃
🗣️ 情景例句
We may revise it this evening, and have it ready to be signed tomorrow morning.
今天晚上我们修改一下并做好准备，明天早上正式签订。
Why are you yelling?
你鬼叫个什么劲儿啊！
You are just saying that.
你只是说说而已。