这样的循环导致在世界的某些地方大范围的人为沙漠化，这主要是由于过度放牧并伴随着自然干旱的发生。
It is such a cycle that has led to widespread desertification in some parts of the world, primarily through overgrazing that can be compounded by naturally occurring droughts.
我国西北地区生态环境恶化严重，湖泊缩小或干涸，沙漠化日益严重，主要原因是人满为患、人为破坏。
Overcrowded with people and human destruction has been leading to ecological deterioration in northwestern China, which appears as desert encroachment and lake drying up.
研究结果表明：(1)库布齐沙漠中东部地区土地沙漠化形成机制是自然和人为因素共同作用形成的。
The results indicated: (1) the driving mechanism of the formation of land desertification in the east part of Kubuqi desert was resulted by the conjunct effects of natural and human factors.
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