Diethylidene
[化] 二亚乙基; 2-丁烯
🗣️ 情景例句
She's coming over this morning to help me with my math.
她今天早晨要过来帮我补习数学。
Shame they won't be there.
可惜他们将不在那儿。
There is an electric cooker in the kitchen.
厨房里有个电灶。