Pentafluorination
五氟化反应
🗣️ 情景例句
I think we should move, I don't feel safe in this neighborhood anymore.
我想我们应该搬家，在这样的邻里关系中我感到不安全。
Doing is better than saying.
行胜于言。
Have a glass of whisky then.
那么，来杯威士忌吧。