In the presence of KOH solid and phase transfer catalysts, difluoro-dichoromethane reacts with acetonitrile to form a brown carbon-rich material, which is a new carbonization reaction.是什么意思_In the presence of KOH solid and phase transfer catalysts, difluoro-dichoromethane reacts with acetonitrile to form a brown carbon-rich material, which is a new carbonization reaction.在线翻译_英语_读音_用法_例句