CFCs are the chief destroyers of the ozone layer.
氯氟烃是破坏臭氧层的元凶。
CFCs are the chief destroyers of the ozone layer.
氯氟烃是破坏臭氧层的元凶。
The ozone layer surrounding the earth protects our skin from being hurt by the ultraviolet rays.
环绕地球的臭氧层保护着我的皮肤免受紫外线的伤害。
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