城市土地利用演化的实质是人为干预下城市生态景观的自组织机制作用过程。
The essence of urban land use evolvement is a functionary process of self-organized mechanism of urban ecological sight in the man-made control.
城市化进程也是一个对原有土地生态系统的改变过程，但对于市地和农地而言，城市化对它们的作用形式并不一样。
The process of urbanization always involves land eco-system change, but it exerts impacts in different forms on farmland and urban land.
而城市森林在建设生态化城市的过程中具有不可替代的重要作用。
Urban forests have a unique function which improves environment in the course of our constructing ecology cities.
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