浓度的数值等于摩尔除以体积。

That's the number of moles over the volume.

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对于面源范围内部的浓度，模式可以通过数值积分算法进行估算，所以用户可以输入任意小的距离。

Since the numerical integration algorithm can estimate concentrations within the area source, the user can enter any value for the minimum distance.

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比较了不同浓度的酵母膏对生活污水中细菌DVC计数值的影响。

The effect of concentrations of yeast extract on DVC of bacteria in sewage water was evaluated.

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