Nerves in the muscles, joints, and skin — particularly the skin on the bottom of the feet — respond to the weight of limb segments and other body parts.
肌肉、关节和皮肤中的神经，特别是足底皮肤的神经对肢体各部分及身体其他部位的重量作出反应。
Researchers said the wear on the bottom surface suggests that it could be the oldest known limb prosthesis.
研究人员说，穿底部表面上表明它可能是最古老的下肢义肢。
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