It is after all a simple ball and socket joint; it has certain loads imposed on it; it needs reliability over a defined life; it must contain materials suitable for the working environment.

它毕竟是一个简单的球窝关节；它有一定的载荷；它在有限的生命中需要可靠性；它必须包含适合工作环境的材料。

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Ball and socket joint at shoulder allows movement in 3 planes.

球窝关节—在肩膊容许三平面的运动。

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It's much harder, they say, to dislocate a screw than a round-ball-and-socket joint.

这种螺纹状的关节与球状关节相比，更难发生脱臼的情况。

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Think of the labrum as a ring of soft tissue that holds the ball of the femur, or thighbone, snugly in the hip joint's socket.

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The Yankees immediately scheduled a more extensive dye-contrast MRI, which showed a significant tear of the labrum, the socket padding that holds the ball of the shoulder joint in place.

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