无分配额的英文：
Ex-Distribution

distribution of concept
概念的周延

This distribution, then, has two modes called a bimodal distribution.
这种分布有两个众数，叫做双峰分布。

The distribution is tabled as below.
其分布情况列表如下。

Termites are principally tropical in distribution.
白蚁主要分布在热带地区。

Microorganisms have a wide taxonomic distribution.
微生物在分类学上的分布是很广泛的。