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Message by UN Chief on the International Day for the Preservation of the Ozone Layer 2020
讲话致辞
讲话致辞
讲话致辞
双语：古特雷斯秘书长2019年保护臭氧层国际日致辞
Message by UN SG António Guterres on the International Day for the Preservation of the Ozo...
讲话致辞
双语：古特雷斯秘书长2018年保护臭氧层国际日致辞
Message by UN SG António Guterres on the International Day for the Preservation of the Ozo...
