The minerals also contain natural SPF to protect against UVB and UVA rays, they replace the skins natural keratin layer that is so important as a defence against bacteria and UV rays.
矿物也含有天然的SPF，以防止紫外线和长波紫外线照射，他们取代皮肤的天然角蛋白层，是如此的重要，作为抵御细菌和紫外线。
Structure characterization and spectrum investigation suggest that the iridescent color of the green and purple barbules should originate from the interference from the top keratin cortex layer.
结构和光谱都说明这两种羽毛的虹彩色都是来由角蛋白表皮的干涉效应造成的。
Structure characterization and spectrum investigation suggest that the iridescent color of the green and purple barbules should originate from the interference from the top keratin cortex layer.
结构和光谱都说明这两种羽毛的虹彩色都是来由角蛋白表皮的干涉效应造成的。
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