臭氧層空洞 chòuyǎngcéngkōngdòng ozone hole Origin Definitions Defs Strokes Stroke Words Sentences Sents 臭氧层 臭氧層 chòuyǎngcéng noun ozone layer the layer of the Earth's atmosphere that contains a high concentration of ozone, which absorbs most of the sun's ultraviolet radiation空洞 kōngdòng noun cavity; hollow a physical cavity, void, or hole; physically empty or hollow inside