二是城乡人口分布结构的转换；
Second, converting the urban and rural population distribution structure;
长期以来，中国一直采取使用行政手段限制城乡人口流动。
For a long time, China has been using the administration means to restrain rural-urban migration.
接着我们对模型作了一个延伸：城市住房价格的增长延缓了城乡人口流动。
We then present a further model extension in which urban house price rises retard rural-urban migration.
针对以上问题形成的原因，提出了今后处置中国城乡人口迁移问题的相关对策。
In addition some countermeasures are also put forward for dealing with the current migration problem in China.
随着城乡人口流动限制的逐步放开，势必出现农村人口大规模向城市的转移和迁徙，产生巨大的就业压力。
With the restriction unlocked gradually, it certainly will present the extensive migration to the city of people in the countryside, and produce the enormous pressure on employment.
研究中，首先根据地理意义和数学意义，对经典的城市人口-面积异速生长模型进行扩展，推导出城乡人口-面积统一模型。
On the basis of geographical sense and mathematical sense, this paper used the model of allometric growth of urban population-area, and a model of rural and urban population-area was generated.
研究中，首先根据地理意义和数学意义，对经典的城市人口-面积异速生长模型进行扩展，推导出城乡人口-面积统一模型。
On the basis of geographical sense and mathematical sense, this paper used the model of allometric growth of urban population-area, and a model of rural and urban population-area was generated.
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