The results show that the asymmetric distribution of orography and that of horizontal diffusion coefficients are likely to be the causes leading to the asymmetric motion.
结果表明：非对称的地形分布和水平扩散系数的分布可能是导致非对称运动的原因。
On the other hand, the diffusion is corresponded with coefficients of turbulent diffusion and wind distribution, the range of horizontal diffusion is greater than that of vertical diffusion.
催化剂的扩散与湍流扩散系数、风场分布相对应，水平扩散范围大于垂直扩散范围。
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