pigmentation
Noun 染色, 着色, 色素沉着, 天然颜色
Invalid [医] 色素沉着, 着色

Regarding pigmentation prevention, when in vivo contracts disease, must remove the cause of disease directly, is an evolution process.
对于色素沉着的防治，当体内患有疾病时，要直接去除病因，是一个渐进的过程。;