Dimethylation
二甲基化作用, 二甲基取代作用
🗣️ 情景例句
What time do you usually have supper?
你通常几点吃晚餐？
My fever is gone.
我的烧已经退了。
After entering the narrow gap on the plateau, they climbed down the steep sides of the cave until they came to narrow corridor.
他们从高原上的窄缝进去，顺着笔直陡峭的洞壁往下爬。来到一条狭窄的走廊上。