He says the relatively large number of patients who are not being treated properly for tuberculosis is fueling the epidemic.

VOA: standard.2009.12.09

Remember that these cells are relatively large compared to bacteria and so diffusion doesn't occur very quickly over this length scale.

要知道这些细胞相对细菌而言,还是比较大的,扩散作用在这种尺度上,发生得不是那么快

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