权威例句
The ozone layer.The ozone layerThe ozone layer.Handbook for the Montreal protocol on substances that deplete the ozone layerSafeguarding the Ozone Layer and the Global Climate System: Issues related to hydrofluorocarbons and perfluorocarbonsSafeguarding the Ozone Layer and the Global Climate System: Issues related to hydrofluorocarbons and perfluorocarbonsProtecting the Ozone Layer: Science and StrategyProtecting the Ozone Layer: Science & Strategy (Book)Protecting the ozone layerProtecting the Ozone LayerHandbook for the Montreal Protocol on substances that deplete the ozone layer : seventh edition (2006)Diurnal variation of stratospheric chlorine monoxide: a critical test of chlorine chemistry in the ozone layer.Protecting the ozone layer : the United Nations history
