对于山地城市建设问题的研究，首先应弄清山地城市的概念。

AS for the study of construction of mountainous cities we should the understand the concept of mountainous city.

youdao

对于山地城市建设问题的研究，首先应弄清山地城市的概念。

AS for the study of construction of mountainous cities we should the understand the concept of mountainous city.

youdao