第五部分结合循环经济理论分析了生态旅游城市的旅游资源的开发与保护问题。

Part v: This part combined the development and protection of the tourism resources in the ecological tourism urban with the circulation economy theory.

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潘建华的文章描述了一套每个经济学家都非常熟悉的理论，这套理论似乎认为生态系统运行在经济理论基础之上。

Pan Jiahua's article describes a mind set, common to almost all economists, that seems to believe that the ecological system runs on economic principles.

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