外侧纵弓指数高，基本维持80 %。

But LLA index was high, which stayed at 80%.

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评价足内、外纵弓；计算足外侧纵弓，低弓和高弓足发生率。

The incidence of lateral longitudinal arch, low arched foot and high arched foot were calculated.

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方法采用二次抛物拱的原理来分析和计算足部纵弓的受力状态。

Methods the states of forces sustained by arcus plantaris were analysed and calculated, according to the mechanism of quadratic parabolic arch.

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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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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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