已有的皮肤光学特性的资料均来源于离体皮肤标本或是经过数学模拟而得，而且这些资料主要来自对白色人种或黑色人种研究的结果，对黄色人种活体皮肤组织的光吸收特性的研究数据甚少。
The existing data about skin optical properties were obtained from in vitro skin samples or by mathematic simulating. Most of those are mainly about white or black race and seldom about yellow race.
已有的皮肤光学特性的资料均来源于离体皮肤标本或是经过数学模拟而得，而且这些资料主要来自对白色人种或黑色人种研究的结果，对黄色人种活体皮肤组织的光吸收特性的研究数据甚少。
The existing data about skin optical properties were obtained from in vitro skin samples or by mathematic simulating. Most of those are mainly about white or black race and seldom about yellow race.
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