The main problem is the nature of their malformation: the maids have usually been represented as being conjoined both at the shoulder and at the hip and are depicted as such on all known moulds.

最主要的问题是她们身体畸形的性质如何：姐妹二人的形象是在胯部和肩膀处都有连接，并且所有的已知模具上都是这样刻画的。

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Because force is generated with help from the ground, bending your knees places your body in better position to produce trunk, hip, and shoulder rotation.

因为力量源自地面，弯曲你的膝盖能让你的身体处于一个更易通过躯干，髋和肩部转动获得能量的绝佳位置。

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Have your partner stand beside you and check that your ear hole, the center of your shoulder joint, the center of your outer hip, and your outer ankle bone are in one line, perpendicular to the floor.

让同伴站到你的侧面检查你的耳孔、肩关节中心、臀外侧中心和外侧踝骨中心是否在一条线上并与地面垂直。

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However, they should be reassured that the vast majority of hip and shoulder replacements are successful.

BBC: Concern over faulty hip joints

In fact, with Touchsurgery, patients can visualize a number of computer simulated operations including removal of the gallbladder (cholycystectomy), removal of the appendix, (appendectomy), as well as common hip and shoulder surgeries.

FORBES: Worried About Your Surgery? Skip the Valium and Download the App

The 1997 British Lion tourist to South Africa, 34, had a hip and two shoulder operations in the last 12 months.

BBC: Injury-ravaged Williams retires