Accelerated urbanization process called for the strengthening of the planning and construction of transportation network urgently. And we need improve the efficiency of urban land use.

加速的城市化进程迫切要求加强交通网络的规划与建设，提高城市土地利用的效率与深度。

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The objective causes for these risks lie with the attraction of cities and urbanization, while the subjective causes arise from urban planning and construction.

城市风险形成的客观原因是城市本身的魅力和城市化发展趋势，城市风险形成的主观原因是城市规划和城市建设。

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Along with the deepening of the process of China's urbanization, the emerging of the city's ecological and environmental problems, the urban green space system planning was attended unprecedentedly.

随着我国城市化进程的不断深入，城市的生态环境问题也不断出现，城市绿地系统规划受到了空前的重视。

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