flat back posture
平背姿势
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Being a 'bridge' with an arched back was the second worse posture, followed by a 'spoon' position with rounded shoulders but a flat back.
身体后屈的“勺形”体型被认为是第二糟糕的姿势，圆肩平脊的“桥形”姿势最糟。
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