这是因为，9月18日《科学》杂志的一篇文章解揭示了蝗虫那柔性的、拍动的翅膀在弯曲和扭转时，如何为它的超长距飞行提供动力。

That's because the bends and twists in locusts' flexible, flapping wings power the insects' extraordinary long-distance flights, a Sept. 18 Science paper reveals.

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时而又来了他年轻时那些夭折的朋友，还有他那面带圣者般的蹙容、须发花白的父亲，以及在走过时却扭转面孔不理睬他的母亲。

Now came the dead friends of his youth, and his white-bearded father, with a saint-like frown, and his mother, turning her face away as she passed by.

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背部在挥杆时起著重要作用，因为我们要经常弯曲背部来进行扭转和发力。

The back is an important part of the golf swing because we use a lot of bending to create torque and power.

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