Pentafluorination
五氟化反应
🗣️ 情景例句
Where was the house?
房子在什么地方？
All truths are not to be told.
真理并不都能说得清。
carrying with him in his pocket what remained of a bottle of medicine formerly prescribed for an indisposition of Mrs.Carlyle's.
衣袋里装上了一瓶他妻子不舒服时吃剩下的药。