在正常的髌股关节中，髌骨的活动轨迹应处于滑车沟的中心。

For a congruent patellofemoral articulation, the patella must track centrally in the trochlear groove.

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整个1月，苏州乐园推出悬挂式过山车、糖果乐园、梦幻许愿墙、小旋风滑车等主题活动。

Through January 31st. Winter festival at the Suzhou Amusement Land. Roller coaster, candy park, wishing wall, whirlwind pulley and more.

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