皮肤英语单词是skin。skin的例句：The risk and severity of sunburn depend on the body's natural skin colour（晒伤的风险和严重程度取决于人体的自然肤色）。

skin的例句：The blood supply to the skin is reduced when muscles stiffen（当肌肉变得僵硬时，皮肤的供血量就减少了）；He had stumbled down and torn the skin from his knees（他绊倒在地，膝盖上蹭破了皮）。