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蚕丝-蚕丝（silk）是熟蚕结茧时所分泌丝液凝固而成的连续长纤维，也称天然丝，是一种天然纤维。人类利用最早的动物纤维之一。据考古发现，约在4700年前中国已利用蚕丝制做丝线、编织丝带和简单的丝织品。商周时期-cansi</br> generated by yvsou girl
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(28.56701.236.7261.7281.7319)
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