而固有的结构性因素及在环境作用下结构性因素的演变导致行业内的竞争激烈，大者不能恒强。
On the other hand the implicit structural factor as well as its evolvement in the circumstance make the competition wild in the industry and the stronger can't be strong for long.
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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