So, you have a patient with a phantom limb. If the arm has been removed and you have a phantom, and you watch somebody else being touched, you feel it in your phantom.
当你接诊一位有幻肢的病人时，幻肢即是 截肢或残废的患者仍感到自己有该肢体的存在，当他观察他人 被触碰时，他也会有此感。