然后再将重心侧向转移到另外一边，身体不能下降，保持肌肉收缩同样的时间。
Shift your weight laterally, all the way to the other side, without lowering your body and hold an equal contraction.
然后再将重心侧向转移到另外一边，身体不能下降，保持肌肉收缩同样的时间。
Shift your weight laterally, all the way to the other side, without lowering your body and hold an equal contraction.
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