1. disorders of melanin pigmentation 
   黑素代谢异常
2. having little skin pigmentation. 
   只有很少的皮肤色素。
3. A member of a major human racial division traditionally distinguished by physical characteristics such as brown to black pigmentation and often tightly curled hair, especially one of various peoples of sub-Saharan Africa. 
   黑人人类一个主要种族的成员，传统上按身体特征来区分，比如肤色棕色渐黑色，常有紧密的卷发，尤指非洲撒哈拉以南地区的人
4. Loss or removal of normal pigmentation. 
   褪色丧失或转移正常的着色
5. Of, relating to, or being a major human racial classification traditionally distinguished by physical characteristics such as brown to black pigmentation and often tightly curled hair and including peoples indigenous to sub-Saharan Africa. No longer in scientific use. 
   黑人的有关或与人类的一个主要种族相关的，这一种族传统上按身体特征来划分，如棕到黑色的皮肤、常有紧密的卷发，包括非洲撒哈拉以南地区的各土著民族。科学上已不再使用

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