1. He was born subnormal and will never learn to read.
   他天生智力低下,永远无法学会阅读。
2. 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.
   研究次正规子群对有限群结构的影响,得到幂零群的若干等价条件和一个充分条件。

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