The objective world we live in is actually a combination of multiple regularities, and human civilization is established in the process of adapting and applying these regularity in the consciousness system. Therefore, it can be imagined that a close and objective connection must exist among different disciplines that humans have developed through long-term accumulation of knowledge. Perhaps from an overall perspective of the objective existence, there may be many shared rules and connections that we have not yet discovered among the rules of various disciplines. This is the fundamental reason for the scientific nature of metaphor and analogy. By finding these common rules, we can use each other to understand strange things. In this study, I proposed the hypothesis that the combination-sharing rule is one of the basic rules that constitute the natural world, and briefly describe the theory by focusing on the sharing phenomenon of regularity. This article is based on the scientific achievements in the process of multidisciplinary development, and discusses the sharing mechanism of regularity in biology through interdisciplinary research.
Keywords: Biology; Combination; Metaphor; Regularity; Sharing; Theory.