Electric fans are more efficient than air conditioning units, but they only move air around as opposed to actually cooling it.

电风扇比空调能效更高，但它们只能使空气流动，而实际上并不是使空气降温。

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Even when the car is off and locked, these fans whir around, so when you step back into it you don't need to crank up the power-hungry air conditioning.

即使在汽车熄火及锁着的时候，这些冷却风扇也在呼呼旋转着，所以当你回到车内时，你无需开大耗电的空调。

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More energy must be fed in to power the computer fans and air-conditioning units needed to remove this heat from the warehouses.

于是需要更多能量驱动计算机风扇或者空调，以便能使房间的温度降低。

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In storm-affected areas, many people had no electricity to run fans, air-conditioning and refrigerators.

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I've been very concerned because a lot of poor people depend upon the LAIHE (ph) Program, the Low-Income-Health Assistance Program, to pay for air conditioning or get fans in the summertime.

CNN: Transcript: Clinton speaks on patients' bill of rights