平足后天性
Flat-footed acquired nature
以上为机器翻译结果，长、整句建议使用 人工翻译 。
扁平足：先天性或后天性足纵弓平坦的一种外科病。足和足跟向外侧旋转，足弓消失，形成八字脚。
Flatfoot: Congenital or acquired flatness of the arch of the foot, in which the foot and heel usually also roll outward, resulting in a splayfooted position.
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