The reason is the spatial concentration of population and resources had the effect of increasing returns to scale.
原因是人口和资源的空间集聚产生了规模收益递增的效应。
Industrial cluster is a phenomenon of spatial concentration of the industries linked in close economic relations in special locations, and it is characterized by path choice of special location.
产业集群是具有密切经济联系的产业在特定区位的空间集聚现象，具有对特定区位的路径选择特征。
Industrial cluster is a phenomenon of spatial concentration of the industries linked in close economic relations in special locations, and it is characterized by path choice of special location.
产业集群是具有密切经济联系的产业在特定区位的空间集聚现象，具有对特定区位的路径选择特征。
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