ADJ (esp of certain sponges) having a horny skeleton (尤指海棉)有角质纤维的
They studied 21 people aged 56 to 85 with actinic keratoses and sun damage.
他们研究了21个从56到85岁的有光化学角质或阳光晒伤的人。
For the rest of you, seborrheic keratoses are among the most common skin lesions of human beings.
对于其他的人来说，脂溢性角化病是人群中最常见的皮肤病。
In fact, some people who live in sun-intense areas develop actinic keratoses and skin cancer in their 20s.
事实上，在那些光照强烈的地区，还有人在20多岁的时候就得了日光性角化病和皮肤癌。
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