如果你们数的话，原子核的数是，我们用它乘以πr的平方，得到横截面积，除以1。

So, the number of nuclei, 119 if we were to sit and count these as well, is 119. So, we'll multiply that by just pi, r squared, to get that cross-section, and divide all of that by 1 .

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结果：正常骨骼肌纤维横截面积较大，形态规则，肌细胞核紧贴于肌纤维的边缘；

Results:Cross section area of normal skeletal muscle fiber was large, morphous was regular, myocyte nucleus located in the edge of muscle fiber;

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