Dihalomethylenation
二卤亚甲基化作用
🗣️ 情景例句
The bridge is about three hundred and eighty-five feet long.
桥长约三百八十五英尺。
He who sees through life and death will meet with most success.
看破生死者，大多会成功。
Tramps seem to be the only exception to this general rule.
在这条普遍的规律前面，