Thirdly, summarize four expressing forms of urban time structure of which isotime curve, isotime circle, time contour and time network.
时间结构的表达则从时间结构的形态方面总结出等时线、等时圈、时间廓线图和网络图等表达形式；
Finally, take out urban population-time contour to evaluate urban time structure.
最后提出城市时间谱概念来评价城市时间结构的优劣。
Finally, take out urban population-time contour to evaluate urban time structure.
最后提出城市时间谱概念来评价城市时间结构的优劣。
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