The first is the tire balance condition, the owners need to do as soon as possible a four wheel positioning and dynamic balance, if the vehicle is not running as a tire dynamic balance.
首先可能是轮胎平衡状况不佳，需要车主尽快去做一个四轮定位和动平衡，如果车辆不跑偏做一下轮胎动平衡即可。
In the dash running the ahead driving leg action not only keeps balance the dynamic body but also save the power of the after driving leg.
在短跑途中跑中，前蹬动作既有制动(持人体动态平衡)用，又有后蹬前的储能作用。
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