这些人的特征是肤色非常黑、干瘦长、肢也长，都是针对散热需求与强烈紫外线辐射的卓越生物适应。
These individuals are distinguished by very darkly pigmented skin and long, thin bodies with long limbs, which are excellent biological adaptations for dissipating heat and intense UV radiation.
肤色是人体的一个非常重要的生物特征。
Skin color is a very important biological feature of the human body.
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