膝盖的方向应与脚的指向相比较-膝盖与脚趾保持方向一致。
Watch where the knees are pointing compared to where the feet are pointing - the knees should point in same direction as the feet.
膝盖的方向应与脚的指向相比较-膝盖与脚趾保持方向一致。
Watch where the knees are pointing compared to where the feet are pointing - the knees should point in same direction as the feet.
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