单词	hydrochlorofluorocarbon
释义	hydrochlorofluorocarbon noun hy·​dro·​chlo·​ro·​fluo·​ro·​car·​bon ˌhī-drə-ˌklȯr-ō-ˌflȯr-ō-ˈkär-bən  -ˌflu̇r- : any of several simple gaseous compounds that contain carbon, chlorine, fluorine, and hydrogen Example Sentences Recent Examples on the Web The initiative to phase out ozone-damaging chemicals known as hydrochlorofluorocarbons (HCFCs), including R22 refrigerant, began in 1987 with the Montreal Protocol. Jessica Levy, Indianapolis Star, 28 Aug. 2019 Some countries in the developing world haven’t yet phased out ozone-damaging chemicals like R-22, a hydrochlorofluorocarbon (HCFC) found in many refrigeration and air conditioning systems. National Geographic, 25 Sep. 2017 Word History First Known Use 1977, in the meaning defined above
随便看	sulfur bacterium sulfur black sulfur chloride sulfur color sulfur dichloride sulfur dioxide sulfur dye sulfur family sulfur flour sulfur hexafluoride sulfur match sulfur monochloride sulfur mushroom sulfur oil sulfur olive oil sulfur oxide sulfur point sulfur polypore sulfur shelf sulfur spring sulfur subchloride sulfur toning sulfur trioxide sulfur water sulfurated

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