The volcano spurted clouds of steam and ash high into the air.

火山把团团热气和灰尘喷向高空。

《牛津词典》

The venting process triggered the explosion when combustible hydrogen released by the steam mixed with oxygen in the air, officials said.

日本官员说，正是被释放的蒸汽包含的可燃氢气在接触到大气中的氧气后，导致了那次爆炸。

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Foodstuffs may be dried in air, superheated steam, in vacuum, in inert gas, and by the direct application of heat.

食物可以在空气、过热蒸汽、真空、惰性气体中干燥，可以用直接加热干燥。

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That track record is especially impressive in light of the fact that D-5 missiles are designed to be ejected into the air by pressurized steam from submerged vessels, and only ignite once they are clear of the water.

FORBES: The Submarine That Might Save America

Last summer an 83-year-old pipe in Manhattan burst, sending a geyser of steam and debris into the air.

ECONOMIST: Infrastructure