选择兰州市典型沙尘和非沙尘天气收集两类降尘，并对其元素组成进行测定。
The dustfall samples collected under typical dust and non-dust weather were analyzed to examine their composition in Lanzhou.
选择兰州市典型沙尘天气和非沙尘天气收集两类降尘，并对其进行粒度测定。
The dustfall samples collected under typical dust and non-dust weather were made particle size analysis in Lanzhou.
利用与非静力平衡中尺度气象模式完全耦合的区域沙尘数值模式，模拟研究这次强沙尘天气过程中沙尘浓度的空间分布结构和时间演变趋势。
The spatial and temporal distribution and development of dust concentration and structure were simulated by a coupled dust model with non-hydrostatic mesoscale model.
利用与非静力平衡中尺度气象模式完全耦合的区域沙尘数值模式，模拟研究这次强沙尘天气过程中沙尘浓度的空间分布结构和时间演变趋势。
The spatial and temporal distribution and development of dust concentration and structure were simulated by a coupled dust model with non-hydrostatic mesoscale model.
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