one-group theory

例句：

1. 1.The one-group theory of evolution posits that all living organisms share a common ancestor.
   进化的一元组理论认为所有现存生物都有一个共同的祖先。
2. 2. This research is based on the one-group theory of social organization.
   这项研究基于社会组织的社会一元组理论。
3. 3.The one-group theory has been challenged by several alternative theories.
   一元组理论被几种替代理论所挑战。