人口、资金等要素向城市移动是由于集中带来了集聚效益，这也是扩大意义上的外在规模经济。
The move of population and fund bring the rise of efficiency which is called scale economy effect.
同时，合理的工业空间布局对于经济效益的高低、土地的合理利用、产业的集聚功能都具有十分重要的作用。
At the same time, the reasonable spatial layout plays an important role in the level of economic efficiency, the rational use of the land, and the industry collecting functions.
对于城市化的理解，笔者认为城市化是一个历史的过程，是以人口的集中为重点的资源集聚过程，是追求效益集约的过程，是城乡互动的过程。
Regarding the urbanization, I think it is a historical progress featuring of the concentration of population , efficiency , mutual interaction between city and rural area.
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