Bend your knees, drop your tailbone down.
弯曲膝盖，沉下尾骨。
Continue to press the shoulder blades against the back, widen them, and draw them toward the tailbone.
继续把肩胛骨压入背部，拓宽它们，拉它们朝向尾骨的方向。
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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