Moments later her back arched, and her arms and legs began thrashing wildly.

过了一会儿，她的背拱起，胳膊和腿开始剧烈抽动。

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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。

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For those of you who work in a desk setting all day, remember to sit upright and keep your lower back arched.

对于那些你谁的工作案头设置一整天，请记住坐在一身正气，让您的腰部拱。

youdao

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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