Stretch when the low back pain: for the poor sitting posture.
伸懒腰时腰痛：多为坐姿不良。
We should keep a good sitting posture, never read the books too closely.
我们应该保持良好的坐姿，看书的时候不要离太近。
We should keep a good sitting posture, never read the books too closely.
我们应该保持良好的坐姿，看书的时候眼睛不要离太近。
We should keep a good sitting posture 1, never read the books too closely 2.
我们应该保持良好的坐姿，看书的时候不要离太近。
Sitting in an unnatural posture for a long time.
长时间保持不自然的坐姿。
Aim for good posture in a neutral position, whether sitting or standing.
应该是这样：无论是坐着还是站着的时候，力求保持中立的良好姿势。
Aim for good posture in a neutral position, whether sitting or standing.
应该是这样：无论是坐着还是站着的时候，力求保持中立的良好姿势。
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