In his mind, he ran his right knee to the ball, while feeling a complete sense of balance and control.
在他的意识里唯一在意的就是在保持平衡和控制感的同时，让右膝关节奔球而去。
Of all the balance ball videos I have seen, this one is the best.
在所有的平衡球我看到视频，这个是最好的。
Of all the balance ball videos I have seen, this one is the best.
在所有的平衡球我看到视频，这个是最好的。
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