Allenic compound
[机] 丙二烯系化合物
🧩 词语组成解析
🗣️ 情景例句
Don't ask why; just do as you are told.
别问为什么， 按要求去做就行了。
I ask him to pay you now.
我要求他现在付钱给你。
That is John Smith,isn't it?
你是约翰。史密斯，对吗？