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。
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）。
Change regularity of joint swing Angle is studied when movable platform moves in space.
对虚轴机床的活动平台在空间运动时关节摆角的变化规律进行了研究。
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