Polyfluorination
多氟化反应
🗣️ 情景例句
I have a book with photos of some homes in that area.
我有一本那个地区房子的照片。
If you have cows you have to get up early to do the milking.
如果你有奶牛，你不得不早起挤奶。
After seven days of this I went to a party.
这样过了7天以后，我去参加一次聚会。