它的鞋跟有一英寸高，鞋尖处弯曲向上翘。

It had a one-inch heel and a toe that curved upwards.

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气流在划过鸟类双翼时会在其后面弯曲向上，这是一种叫上升流的现象。

The air flowing over a bird’s wings curls upwards behind the wingtips, a phenomenon known as upwash.

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滑雪场：一块金属，弯曲向上在前面，并有利于滑动就下雪。

Ski: piece of metal, curved upward at the front and that facilitates sliding on snow.

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