劍橋詞典a joint (= a place where two bones are connected ) consisting of a round end and a hollow socket that fit together and move easily 球窩連接；球窩關(guān)節(jié) The hip joint is a ball-and-socket joint . 髖關(guān)節(jié)屬于球窩關(guān)節(jié)。 返回 ball-and-socket joint