风将地面尘土、沙粒卷入空中，使空气非常混浊，使水平能见度小于1千米的天气现象。
医师王学晶建议，市民在沙尘暴天气时应尽可能待在室内并关上门窗。
Doctor Wang Xuejing advises that, when possible, people should stay indoors and close the Windows during sandstorms.
同时，依据诊断分析的结果，简要给出了宁夏沙尘暴天气的预报着眼点。
At the same time, we got the outline for forecasting the sandstorm in Ningxia based on the result of diagnostic analysis.
中国每年遭受的强沙尘暴天气由50年代的5次增加到了90年代的23次。
Every year China suffered strong sandstorm weather increased from 50 s five times in the 90 s of the 23 times.
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