自周一星先生对1980年我国城市规模分布做了详细的研究以来，已经有二十多年没有进行较为详细的城市规模分布研究了。

Since Mr. Zhou's detailed research of China's city size distribution in 1980, we haven't do more detailed research about it in the past.

youdao

自周一星先生对1980年我国城市规模分布做了详细的研究以来，已经有二十多年没有进行较为详细的城市规模分布研究了。

Since Mr. Zhou's detailed research of China's city size distribution in 1980, we haven't do more detailed research about it in the past.

youdao