All of the children had atopic dermatis covering at least 20% of their body surface area.
所有的患儿体表有超过20%的遗传性过敏症皮炎感染。
These treatments are most successful in patients with vitiligo over less than 50% of their body surface area.
这些都是最成功的治疗白癜风患者的不到50 %的体表面积。
It's easy for the beasts to overheat: they may face temperatures of up to 120 degrees Fahrenheit, and they don't have much skin surface area to radiate the heat relative to their big body volume.
野生动物总是很容易就身体过热：它们的体温可能超过120华氏摄氏度，而且能够辐射热量的皮肤表面积也不多。
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