The inventor Henry Bessemer discovered that directing a blast of air at melted iron in a furnace would burn out the impurities that made the iron brittle.

发明家亨利·贝塞默发现，在熔炉里对铁水直接吹一吹气，就会烧掉使铁变脆的杂质。

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If, for instance, you have a ball held up in the air by a blast of air, it is floating on air.

例如，你有一个球是通过空气爆发的方式被举起来的，它现在就浮在空气当中。

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A blast of hot air hit us as we stepped off the plane.

我们下飞机时，一股热浪向我们袭来。

《牛津词典》

Sixteen-year-old Ben, who works for Hannifin, delights in demonstrating the Airzooka, literally an air cannon that sends a blast of air 20 feet or so.

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After the radical blandness of her predecessor, Mr Christopher, Mrs Albright is a gale-force blast of fresh air.

ECONOMIST: Madeleine s��en va-t-en guerre