posture keeping invariable
（1） Sitting， lowering head ahead， chin resisting throat. Posture keeping invariable， head swing back. Then turning head righter as far as possible， nodding three times. Turning left， nodding the same three times. Repeating ten times completely.
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posture keeping invariable
姿势保持不变
以上为机器翻译结果，长、整句建议使用 人工翻译 。