Polyhalogenation
多卤化反应
🗣️ 情景例句
Will it be too late if I call around 9:00 tonight?
如果我在晚上9点左右打来会不会太晚？
Labour is often the father of pleasure.
勤劳常为快乐之源。
I would like to give you an example, but fortunately I cannot do so.
我愿为你举个例子，但幸亏我举不出。