词典释义：
释义
n.
a region of marked thinning of the ozone layer in high latitudes, chiefly in winter, attributed to the chemical action of CFCs and other atmospheric pollutants. The resulting increase in ultraviolet light at ground level gives rise to an increased risk of skin cancer.
臭氧洞（高纬度地区臭氧层的稀薄区，主要出现在冬季，被认为是臭氧与氯氟烃类及其他大气污染物产生化学反应的结果，由此产生的地面紫外线增强导致了得皮肤癌的危险增加）。