Lean on the ball as shown, keep the back flat or maintain its natural curve, with the legs straight.
身体俯卧于球体之上，动作如图所示。背部保持正直或保持自然弯曲状态，腿部伸直。
Keep your front shin vertical, back knee straight, back heel lifted, and chest lifted.
保持前面小腿垂直地板，后膝伸直，后脚跟离地，胸腔上展。
Your body should be straight up in the water; don't lean forward much or hunch over. Keep your shoulders back and look straight ahead.
你的身体在水中应该保持正直，挺胸、目视前方，不要过度前倾或伛偻。
Pitchford points out several form faults: "You want to keep your back straight and not allow the knee to drift forward ahead of the stance leg.
Pitchford指出许多种错误动作： “你应该保持背部挺直，膝盖不应该向前超过支撑腿。
So you want to take your shampoo, hold your arm straight up, keep your arm right next to your ear, and then simply bend your elbow to ninety degree, and then lift it back up.
你要拿起洗发水，手臂向上伸直，紧贴耳朵，然后只要将手肘向后弯曲90度，再将手肘伸直。
Remember, while your thighs are drawing strongly back, resist forward with your upper calves and upper front shins to keep your legs straight.
记住，但你的大腿强有力地往回拉时，保持小腿上部和前侧胫骨的上部向前来保持你腿的正直。
The most essential point of the meditation posture is to keep the back straight, like "an arrow" or "a pile of golden COINS".
禅坐姿势的最大要点是要保持背部挺直如箭，或如一堆金币。
Keep your posture straight and erect. Your head should be up, your back straight, and shoulders level.
保持您的姿势挺而直，抬起头，挺直腰，双肩水平。
Keep your back straight, head up and turned towards the target, and straighten your bow arm, but keep the elbow unlocked.
保持背部的挺直，头转向目标，伸直你的持弓臂，同事保持肘部的放松。
Set your feet shoulder-width apart, and keep your knees slightly bent, back straight, and eyes focused straight ahead.
双脚与肩同宽，保持膝部稍弯，后背挺直，双眼注视前方。
Sharp blade key: hand must keep horizontal motion, force must be uniform and owner. on back must be straight or round straight, nearly edge department can not have a little hunchback.
刀刃锋利的关键所在：手必须保持水平运动，力必须均匀，刀背必须保持平直或圆直，近刃口部不得有一点驼背。
Sharp blade key: hand must keep horizontal motion, force must be uniform and owner. on back must be straight or round straight, nearly edge department can not have a little hunchback.
刀刃锋利的关键所在：手必须保持水平运动，力必须均匀，刀背必须保持平直或圆直，近刃口部不得有一点驼背。
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