backward swinging gangway [船] 后转式尾门
At the same time, two arms curving slightly, swinging forward and backward rhythmically like walking.
同时，双臂略弯曲，像走路一样有节奏地前后摆动。
The whole structure of supporting action of running can be divided as following: enforcing from the axis muscles, lowering actively the swinging leg and backward kicking of the shank.
其中身体中轴肌群发力，摆动腿积极下压，小腿积极后扒一次完成整个支撑动作是跑的动作结构。
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