您要查找的是不是：
- Engel群Engel group
- 一群regiment
- 群组group
- n-Engeln-Engel
- 左n-Engelleft n-Engel
- 一群人bevy
- 弱左Engel元Weak left Engel element
- 集群colony
- Engel级数展式Engel series expansion
- 群发mass-sending
- Engel连分数展式Engel-continued fraction expansion
- 群名group name
- 大群army
- 群论group theory
- 群集throng
- 群殴melee
- 分群hive off
- 产业集群industry cluster
- 群交flock-mate
- 总群parent population
