社会行动单位既是一个数量概念，也是一个关系范畴。
Social action unit is not only a quantity concept but also a relation category.
等同范畴是一个重要的认知范畴，认知层面的等同范畴是一种关系范畴。
Identity category is an important cognitive category and identity category in cognitive domain is a kind of relation category.
第二章：首先将空间关系语义范畴划分为一般空间关系范畴和个别空间关系范畴。
Chapter II: First, the relationship between semantic category space is divided into general areas of spatial relationships and individual areas of spatial relationships.
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