Diethylidene
[化] 二亚乙基; 2-丁烯
🗣️ 情景例句
He should just about get by in the exam.
他这次考试还能勉强及格。
I want to report a theft.
我要报一宗盗窃案。
I didn't mean to offend you.
我不是故意冒犯你。