There's some variation depending on hair colour but for an average adult the strand count is 100,000, so losing 100 a day is not too bad.

不同的发色会有不同的变化，但是对于一个普通的成年人来说，头发的数量是10万根，所以每天失去100根也不是太糟糕。

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Three new genetic loci have been identified with involvement in subtle and quantitative variation of human eye colour.

三种新的基因位点与人眼颜色的微小及定量变化有关。

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Sometimes I use this on hair to sharpen the details and disperse the colour which can be worked into the hair to give it more tones and variation, and less of a monochrome look.

有时候，我用这个工具去锐化头发的细节，并且分散头发的颜色，可以使头发的颜色存在更多的明暗对比和变化，并且可以少用单一的颜色。

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