To reduce air pollution, the government needs to impose a ceiling on carbon emissions.

为减少空气污染，政府需要设定碳排放上限。

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Lofty rooms are therefore difficult to heat because the warm air ascends towards the ceiling.

冬天，比较高的屋子一般来说不容易加热，这是因为热空气都跑到天花板去了。

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Ceiling ducts to direct the air from the blower to the rear of the trailer.

顶部输送管会将空气从风扇吹送到拖车后面。

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In the winter, warm air near the ceiling is pushed downward, reducing heating bills.

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And then, neutralizing gravity with love and pure will, they remained suspended in air inches below the ceiling, and they kissed each other for a long, long time.

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Central European time from Manching Air Base and climbed to a ceiling of 54, 000 feet within military controlled airspace, far above and at a safe distance from civilian air traffic.

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