One social group has one system. Some countries have four or five systems. Under each system, there are sub-levels. They are very fragmented.
一个群体一个制度，有的国家是四个制度，五个制度，每个制度下面还有小的制度，形成碎片化，法国是最典型的。
Each group was sub-divided different subgroups.
每组又分为不同的亚组。
This paper discusses the semigroups, each of whose sub-semigroups generated by single element is a group and some structural theorems of these semigroups are derived.
本研究每元生成的子半群成群的半群，得出这种半群的某些结构定理。
This paper discusses the semigroups, each of whose sub-semigroups generated by single element is a group and some structural theorems of these semigroups are derived.
本研究每元生成的子半群成群的半群，得出这种半群的某些结构定理。
应用推荐