针对现行教材中对必然性与偶然性产生的根据与作用的说法 ,从系统科学研究成果的角度进行了讨论 ,认为必然性、偶然性的产生都既有内部原因 ,也有外部原因 ,偶然性在一定条件下对事物的发展也会起决定作用。在此基础上 ,才能更好地、全面地把握其辩证关系 ,才能正确地看待各种问题 In view of the basis and function of necessity and contingency in the current teaching materials, this paper discusses from the perspective of systematic scientific research that there are both internal and external causes for necessity and contingency, and under certain conditions, The development will also play a decisive role. Only on this basis can we grasp the dialectical relationship better and comprehensively so that various problems can be viewed correctly