Perfluoroalkylation
全氟烷基化
🗣️ 情景例句
I shouldn't have done that.
我不该那么做。
One should travel out of his own country at least once.
我们至少应该离开自己的国度去旅行一次。
I know it's not necessary. I want to do it.
我知道不必这样，可是我愿付？/span>