Your distance runs, of course, produce aerobic gains, including increased blood volume and capillarization, enhanced mitochondrial density and size, and improved slow-twitch fiber development.

你的耐力训练可以提高你的有氧能力，包括增加血液量和斜阳能力，提高线粒体的密度和体积，促进慢肌纤维的发育。

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Of course, to compute this,you need to know the density.

为了计算这个，需要知道密度。

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If a density is uniform then, of course, the density gets out and you can simplify and reduce to that if all the points are equally likely.

如果一个密度是常数，密度可以提出来，如果所有点是平权的，那就可以简化了。

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