采用科学史观简要分析了黄土高原生态环境演变的历史过程。
The process of eco-environment change was analyzed article with scientific view of history.
城市热环境的空间格局对城市微气候、城市生态环境演变有重要影响。
Spatial thermal environment has a full impact on microclimate and urban zoology.
从历史、地理、自然、生态的角度，大跨度、高视野、多方位对黄河中游生态环境演变过程进行了探讨。
From the historical, natural and ecological point of view, this article researched the course of evolution of the ecological environment in the middle reaches of Yellow River.
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