通过将该半解析解与忽略扩散的数值解进行对比分析，讨论了数值弥散代替物理扩散的条件。
Then this paper studied the effect of diffusion coefficient on concentration distribution and the conditions of substitution with numerical dispersion for physical diffusion.
该面以外的脉冲星的弥散也许有其真正的物理原因。
There may be a real physical cause for dispersion of the pulsars out of the plane.
紊流扩散和纵向弥散是两个不同的物理概念。
Turbulent diffusion and longitudinal dispersion are two different physical concepts.
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