Dichloromethylation
双氯甲基取代作用(引入两个氯甲基)
🗣️ 情景例句
He keeps himself fit by running 5 miles every day.
他每天跑五公里以保持身体健康。
What platform does the train leave from?
这班车从哪个站台开出呢？
We don't have space in the warehouse for it.
我们仓库没有空位了。