epidermis

[生]表皮, 上皮英释中释nthe outside layer of your skin

1 The pigment in the upper layer of skin (epidermis) that gives your skin its normal color is called melanin..在浅层皮肤（表皮）中有种色素能让你的皮肤保持其正常的颜色，称为黑色素。

2 Skin color is due to melanin, a pigment produced in the epidermis to protect us from the sun's potentially cancer-causing ultraviolet (UV) rays..这是一种产生于表皮的色素，能够保护我们免受来自紫外线的侵袭。 紫外线正是来自太阳的潜在致癌物。