Over time, though, these filters penetrate into the skin below the surface of the epidermis, the outermost layer of skin, leaving the body vulnerable to UV radiation.

 
  • 经过一段时间后,这些过滤因子渗入表皮底下,最外层的皮肤(不再受保护),使身体容易受到紫外线辐射。
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