pfn stretching exercise pfn法拉伸练习
passive stretching exercise 被动牵张运动
stretch oneself stretching exercise 伸展身体
PNF stretching exercise PNF法拉伸练习
ankle stretching exercise 释义伸踝操练
manual stretching exercise 手法牵张运动
active stretching exercise 主动牵伸运动
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