Then she leapt backwards, back arched and fur on end, tail held out stiffly.

然后，她向后一跃，脊背拱起，毛发竖立，尾巴僵 直地伸着。

youdao

On the inhale bend your left knee as you bring your arms forward and raise them overhead, fingers interlocked, palms facing up, and upper back arched slightly.

吸气时曲左膝，同时双臂向前高举过头，交叉十指，掌心向上，上背部微微拱起。

youdao

The cat arched its back and hissed.

猫弓起背发出嘶嘶声。

《牛津词典》

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

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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