dichlorodifluoromethaneWiktionary 原文英美构词拆解dichlorodichloro词干difluorodifluoro词干methanemethane词干词源说明From dichloro + difluoro + methane.释义名词noun1(organic chemistry) A chlorofluorocarbon halomethane formerly used as a refrigerant and aerosol spray propellant, now banned in many countries because of its effects on the ozone layer.