在建立的自己的模型之前，本文首先回顾了有关城市形成和城市位序规模分布的研究历程和研究成果。

Before introduce the new model, this paper reviews the research history and research findings of city formation and rank-size distribution of cities firstly.

youdao

在建立的自己的模型之前，本文首先回顾了有关城市形成和城市位序规模分布的研究历程和研究成果。

Before introduce the new model, this paper reviews the research history and research findings of city formation and rank-size distribution of cities firstly.

youdao