The hock, as the hind foot leaves the ground, should first move forward rather than being pulled upwards, but certainly not backwards.
当后蹄离开地面时，飞节首先是向前运动，而不是向上提，当然更不会向后动。
The hock, as the hind foot leaves the ground, should first move forward rather than being pulled upwards, but certainly not backwards.
当后蹄离开地面时，飞节首先是向前运动，而不是向上提，当然更不会向后动。
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