Unascertained normal subgroup is also studied.

并且研究了未确知正规子群。

youdao

Especially, people pay much attention to those normal subgroup.

这些子群中，人们特别关注那些正规的同余子群。

youdao

Especially, people pay much attention to those normal subgroup.

这些子群中，人们特别关注那些正规的同余子群。

youdao