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对原文“在缓冲阶段，人体在水平方向上移动的速度最大”等５个问题，提出不同看法，旨为探讨跑的原理，进一步提高认识水平。
This paper puts forward different opinions on the five issues “the maximum speed of the human body moving in the horizontal direction during the buffering phase”, aiming at exploring the principle of running and further raising the level of cognition.