指强风夹带大量沙尘、干土导致空气浑浊天色昏黄能见度小于1km的风沙现象sand and dust storm

• 特大沙尘暴是现代黄土搬运并沉积的运动表现。

  Exceptionally big sandstorms are a manifestation of present-day movements of loess dust and sediment.

• 今年春天，我国许多地区连续发生12次大风扬沙和沙尘暴天气。

  This spring, there were 12 consecutive incidents of sand-blowing gales and sand and dust storms in various parts of the country.