a fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair feathers nails and hooves.
外层皮肤和头发、皮肤、指甲及蹄等组织里的纤维硬蛋
质。
质a fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair feathers nails and hooves.
外层皮肤和头发、皮肤、指甲及蹄等组织里的纤维硬蛋质。
声明：以上例句、词性分类均由
资源自动生成，部分未经过人工审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我们指正。
