Considering the subnormal subgroups,some equivalent conditions for nilpotency of finite groups are given and a sufficient condition for nilpotency of finite groups is obtained.
Indeed it seems capable of remaining in a chronic condition of subnormal activity for a considerable period without any marked tendency either towards recovery or towards complete collapse.
Peter also said he had a crush on the eldest hasty sister and had been rejected, while all the hasty children had mocked Peter for being educationally subnormal, as the British put it.
力低下,永远无法学会阅读。
有限群结构的影响,得到幂零群的若干等价
件
一个充分
一段时间内保持
， 
有任何明显
