An arched back and tucked in elbows helps create that authentic 'chook' look.

后背弓起，手肘收起，让参与者看起来更像一只真正的鸡。

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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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The cat arched its back and hissed.

猫弓起背发出嘶嘶声。

《牛津词典》

As if one, every feminist of childbearing age in America (we exaggerate, but only slightly) simultaneously arched her back and let out a deafening hiss.

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But if you do have to lift, "do more of a knee squat, your back arched as if looking to the sky, " Goitz advises.

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Swaying from side to side, his back arched almost to the point of snapping, Jamie Foxx, as Ray Charles, seems pulled upward to the heavens and downward to the keys at the same time.

NEWYORKER: Ray