As far as content of studies, seven aspects are included: regional, central-place, urban hierarchical, commodity flow, interactive, diffusive, and model simulating linkages.

就研究内容而言，包括：地区联系、中心地联系、城市等级联系、商品流联系、相互作用联系、扩散联系、模型模拟间接反映的区域联系等七个方面；

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As far as content of studies, seven aspects are included: regional, central-place, urban hierarchical, commodity flow, interactive, diffusive, and model simulating linkages.

就研究内容而言，包括：地区联系、中心地联系、城市等级联系、商品流联系、相互作用联系、扩散联系、模型模拟间接反映的区域联系等七个方面；

youdao