... 等温绵 isotherm 等时差曲线 isotime curve 等磁年变线 isporic line ...
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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;
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