What is more, tunnels need power for lights and ventilation fans, and to run pumps when they flood, whereas Bridges require almost none.

除此之外，隧道需要电能来为隧道里的灯光与通风扇供电，还需要在隧道被淹的时候使用水泵，而桥梁则不需要这些。

youdao

Power off and turn on the ventilator, allows for natural ventilation.

关闭电源，打开通风器，可实现自然通风。

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Investigators say gas accumulated during a power outage that shut down the mine's ventilation system.

调查人员说，由于断电，矿井内的通风设备停止运行，矿井内瓦斯积聚。

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Running the trains had been more difficult on the Manhattan side of the river, the official said, because there wasn't sufficient power to operate ventilation fans to clear diesel fumes.

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She believed the solar-paneled roof would power the entire car, not just the ventilation system, as is actually the case.

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Mr. Garrison, the architect, said each one features skylights and extensive natural ventilation, with solar panels on their roofs to generate power.

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