1. Some people mistakenly believe that all Asians are xanthochroic, which is not true.
有些人错误地认为所有亚洲人都是黄皮肤的，这是不正确的。

2. The xanthochroic pigmentation is caused by a genetic mutation in certain populations.
黄色皮肤的色素沉着是由特定人群中的遗传突变引起的。