The distance and the direction of sand-dust transport depend on the atmospheric circulation.

沙尘的传输距离和方向与大气环流的变化情况直接相关。

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The phenomenon of wind erosion and desertification is widespread in mountain area of hebei province and it plays an important role in sand-dust storm in2000.

风蚀沙化现象在河北山区普遍存在，在2000年的沙尘暴中扮演了重要的角色。

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This study was conducted in the aspects, such as, dry climatic background, circulation conditions, possible sand-dust sources, paths of sand transportation, and synoptic systems.

作者从干旱气候背景、环流状况、沙尘源、沙尘路径及天气系统等方面进行了分析，并集中对引发强沙尘暴的蒙古气旋进行了诊断分析。

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Earth is bombarded with more than 100 tons of dust and sand-sized particles every day, much of it falling into the oceans or remote areas, and otherwise going unnoticed.

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It meets the highest standards of resistance to dust, sand, shock, vibrations, low pressure, high and low temperature, rain and long-term moisture.

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These huge, sky-blackening dust storms sweep across Asia in March and April, bringing with them millions of tons of sand from inner Mongolia and depositing it in China and on across the Korean peninsula to Japan.

CNN: Desertification: How to stop the shifting sands