In the loess area of west China, the geographical hazards especially loess landslides shows the tendency of growing.
在我国西部尤其是生态环境比较脆弱的黄土地区，地质灾害尤其是滑坡灾害有逐渐增多的趋势。
The extent, nature, and arrival time of these hazards are difficult to predict. The geographical dispersion of hazard effects will be defined by the following
核爆影响的范围，性质及达到的时间很难预测。核爆在地理上的散播程度受限于如下条件
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