单词	ball-and-socket joint
释义	ball-and-socket joint noun : a joint in which a ball moves within a socket so as to admit of rotary motion in every direction within certain limits (as the hip joint) — called also ball joint
随便看	mare liberum maremma mareng mareng cell marengo mare nostrum mareograph mare's mare's nest mare's tail marey's marey's law marfan marfan's marfan's syndrome marfan syndrome marfire marg marga marga margarate margaret margaret grunt margaric margaric acid

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