稳定、微风，通过增加蒸发皮肤表面汗流的速率降温。

Thanks to a steady, gentle breeze, they "cool" by increasing the rate at which perspiration is evaporated from the skin's surface.

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但是这种能源不稳定：今天可能是狂风大作，而明天可能是就是微风拂面。

But this power source can be a bit fickle: today it might gust, while tomorrow could bring barely a breeze.

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