The arid areas in west China are the natural experimental fields for arid area research.
中国西部干旱区是干旱区研究的天然实验场。
The first intensive use of land was from the agricultural society, after that it was introduced to the urban land area research.
土地集约利用最先来源于农业社会，后引入城市土地研究领域。
The first part is mainly of the domestic and foreign scholars to summarize about the urban fringe area research present situation as well as the research significance of this article.
第一部分主要是综述国内外学者对于城市边缘区的研究现状以及本文的研究意义。
The first part is mainly of the domestic and foreign scholars to summarize about the urban fringe area research present situation as well as the research significance of this article.
第一部分主要是综述国内外学者对于城市边缘区的研究现状以及本文的研究意义。
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