knucklen.指关节；膝关节；肘形接头；铰链连接v.以指节压；屈从；开始努力工作knuckle stern折角形艉knuckle underv.认输；屈服knuckle angle过渡角knuckle wheel圆齿顶齿轮knuckle-pin转向节销,关节销,肘销knuckledustern.指节铜套knuckle drive铰节传动knuckle throw关节拆开器knuckleballern.[棒]不旋转球投手knuckle jointn.肘形接头