并分析绝对集中度和赫佛因德指数在测算该产业的市场集中度时能够相互补充和验证。
Concentration degree and Herfindahl Index can be mutually complementary and verified in measuring market concentration degree of expressway industry.
城市形态指数与土地利用变化指标有很好的互补性，两者结合可以更充分描述城市扩展的特征和过程。
The metrics of urban morphology and urban land use are compulsory to each other which can be used to satisfactorily describe the process and characteristics of urban expansion.
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