Remethylation
再次甲基取代作用
🗣️ 情景例句
Never pump gas with the engine running.
发动机在运转时，别加油。
Is it long way from here to the United Air Lines counter?
从这里到美国航空公司柜台有一段很远的路。
But I think it's much nicer in a paper bag,in the open air!
不过我想把它放在纸袋里，在露天吃更好！