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1·As for its essence, urban is the spacious organization form which agglomeration economies and its undertakers depend on.

就其本质而言，城镇是聚集经济及其社会承担者存在的空间组织形式。

2·External economies are the most important mechanism of industrial agglomeration.

外部经济是产业集聚的重要机制。

3·The integration of a loosened-up assumption mechanism and the generative mechanism of agglomeration improves the explanation power of spatial economies.

逐渐放松中的假设与聚集生成机制的不断结合将增加空间经济学理论对现实的解释力。