Dimethylation
二甲基化作用, 二甲基取代作用
🗣️ 情景例句
And now to make sure we've got the hamburger patties.
现在确定一下我们带了汉堡碎肉饼。
I hope you can see me.
我希望你能看望我。
How long has he been like this?
他像这样有多久了？