结果表明，喀斯特石漠化是在脆弱的生态环境地质背景上由于人类的强烈扰动而形成的，是多种因子综合的结果。
The result shows that karst rocky desertification is formed by intense human turbulence in the frail geo-ecological environmental background, is the comprehensive outcome of many factors.
第一章为生态环境与历史背景分析。
Chapter one is the analysis of ecological environment and historical background.
我们讨论东汉洛阳地方的经济生活和文化历史时，不应当忽略与此有关的生态环境的背景。
On discussing the economic life and cultural history of Luoyang in the Eastern Han Dynasty, we should attach an importance to its ecological and environmental background.
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