Message by UN SG António Guterres on the International Day for the Preservation of the Ozo...
讲话致辞
讲话致辞
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...
