Diethylidene
[化] 二亚乙基; 2-丁烯
🗣️ 情景例句
What are you trying to say?
你想说什么？
It is too late to shut the stalbe door when the steed is stolen.
失马锁厩，为时已晚；贼去关门，为时已迟。
You've got a point there.
你的话很有道理。