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setae are not keratin based mammalian hairs but are composed of chitin as is its exoskeleton

setae are not keratin based mammalian hairs but are composed of chitin as is its exoskeleton

标签: setae,are,not,keratin,based,ma 浏览: 14
these are not really hairs at all in the mammalian sense which are composed of keratin

these are not really hairs at all in the mammalian sense which are composed of keratin

标签: these,are,not,really,hairs,at, 浏览: 16
like the hair and nails of mammals feathers are also composed of the durable protein known as keratin

like the hair and nails of mammals feathers are also composed of the durable protein known as keratin

标签: like,the,hair,and,nails,of,mam 浏览: 17

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keratin 风景 keratin 高清 keratin 背景 keratin 壁纸 自然 keratin