As you deepen the bend of the knees, maintain a straight line from the top of your head to your tailbone.

当你加深双膝的弯曲幅度是，保持头顶到尾骨一条直线.

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As you deepen the bend of the knees, maintain a straight line from the top of your head to your tailbone.

当你加深双膝的弯曲幅度是，保持头顶到尾骨一条直线.

youdao