并且研究了未确知正规子群。

Unascertained normal subgroup is also studied.

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本文继续研究了群中的粗糙子群和粗正规子群。

In the paper, Rough subgroups and Rough normal subgroups in a group are further considered.

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这些子群中，人们特别关注那些正规的同余子群。

Especially, people pay much attention to those normal subgroup.

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这些子群中，人们特别关注那些正规的同余子群。

Especially, people pay much attention to those normal subgroup.

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