从斯德哥尔摩到里约热内卢再到约翰内斯堡,共同但有区别的责任原则经历了“孕育——确立——发展”的嬗变过程,其实践范畴也得到进一步拓展。然而,碎片式的立法样态及各国阐释上的重大差异成为此原则实施中的一个内在困境。统一性示范规则的建构及功能性方法的引入,将有助于完善共同但有区别责任原则的内涵要素并消除各国阐释上的持续性摩擦。 From Stockholm to Rio de Janeiro to Johannesburg, the principle of common but differentiated responsibilities has undergone a transformation from birth to establishment to development, and its practice has been further expanded. However, the fragmented legislative style and major differences in interpretations among countries have become an inherent predicament in the implementation of this principle. The construction of unified model rules and the introduction of functional methods will help improve the connotative elements of common but differentiated responsibilities and eliminate the persistent friction in interpretations of various countries.