印鼠客蚤这种聚集型分布意味着该蚤的个体分布不均匀，而是在宿主动物体表形成大小不等的聚集蚤群。
The aggregated distribution pattern means that the flea individuals do not evenly distribute on rat host but gather as different size groups on rat individuals.
二连盆地是在海面褶皱基底上发育起来的中新生代断陷湖盆群，共发育大小不等的50个凹陷。
Erlian basin, a cluster of rift lake basins in the Mesozoic and Cenozoic eras developed on the base of the Hercynian fold belt, consists of 50 sags in different scale.
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