The scale of development and utilization of urban underground space expands with the enhancement of urbanization and economy level in a city.
随着经济水平和城市化水平的不断提高，城市地下空间开发利用规模不断扩大。
The scale of development and utilization of urban underground space expands with the enhancement of urbanization and economy level in a city.
随着经济水平和城市化水平的不断提高，城市地下空间开发利用规模不断扩大。
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