求翻译：　　四肢着地，膝盖并拢，双掌与肩同宽，大腿、手臂与地面垂直。抬起左膝，同时提胯，并且向后伸展右腿，右脚脚背弯曲。伸右腿时，臀肌收缩，并将腿稍稍向外送。胯部保持平衡，身体重心放在双掌和左脚上。是什么意思？

Fours, knees bent, palms shoulder width, thigh, arm perpendicular to the ground. Lift left knee, while increasing hip and right leg extended backward, bending his right foot instep. Extended right leg, gluteal muscle contraction, and send out a little leg. Hip balance, body weight on the palms and t

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　　The four limbs are well-grounded, the knee gathers, the double palm and the shoulder same width, the thigh, the arm and the ground are vertical.Lifts the left knee, simultaneously raises the hip, and backward extends the right leg, the right foot instep is curving.When extends the right leg, the g

　　Limbs, knees together, double Palm and shoulder width, leg, arm, perpendicular to the ground. Lift the left knee, and hip, and stretch the right leg backward, right foot instep bent. Extension when right leg, gluteus contraction, and send leg slightly outward. Crotch balance body weight in two-han

　　The four limbs are well-grounded, the knee gathers, the double palm and the shoulder same width, the thigh, the arm and the ground are vertical.Lifts the left knee, simultaneously raises the hip, and backward extends the right leg, the right foot instep is curving.When extends the right leg, the g