If your foot is at a right Angle to your outstretched leg and does not dangle, you have a low ankle-joint axis and will be more comfortable in flat shoes than in high heels.

如果你的脚和你伸直的腿成直角，且没有晃荡，那么说明你有一个较低的踝关节，你穿平底鞋会比穿高跟鞋更舒适。

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In combination, joint, cut off, the shape of the intersection to get the default Angle always like the first selected shape point of view.

在组合、联合、剪除、交点得到的形状默认角度总是与第一个选中形状的角度一样。

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Result:Unaffected side of hemiplegic patient and normal lower limb were notable different in time parameters, space parameters and knee joint angle(P<0.01).

结果：患者的健侧下肢与正常人的两下肢在时间参数、空间参数、膝关节角度等方面均存在显著差异（P<0.01）。

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