How to: Sit on a stability ball with feet hip-width apart on the floor.
如何锻炼：稳坐在一个球上，双照着地，与胯同款。
Hip breadth is used for chair width and armrest width.
髋广度是用于宽度椅子扶手和宽度。
Objective To measure the width of space in front of the femoral neck at different age of normal children for diagnosis such as hip disease in children as bilateral transient synovitis of the hip.
目的测定不同年龄正常儿童股骨颈颈前间隙的宽度，为儿童双侧髋关节疾病如双侧髋关节一过性滑膜炎的超声诊断提供正常参考值。
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