(3)橢圓關節(Ellipsoidal joint)
(A)彎曲及伸長(flexion and extension)
(B)外展及內收(abduction and adduction)
(C)迴旋(circumduction)
(D)旋轉(rotation)

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統計: A(1), B(0), C(0), D(0), E(0) #3880460