土地利用和植被覆盖变化研究，是当前国际科学研究的前沿领域之一，是研究气候变化的重要基础。
The research on land use and vegetation cover change is one of the leading fields of the contemporary international science research, and the important basis of the climate change.
亚洲西南部的气候变化更为微妙，因为它们涉及到山地雪线、降雨模式和植被覆盖率的变化。
The climatic changes in southwestern Asia were more subtle, in that they involved shifts in mountain snow lines, rainfall patterns, and vegetation cover.
植被覆盖及其变化是全球和区域生态环境变化的重要指示。
The change of vegetation coverage indicates the changes of global and regional entironment.
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