复数： conditioners

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He gave her an air conditioner and may even have proposed marriage .

他曾送给她一台空调，甚至还可能向她求过婚。

That 's important because an air conditioner works by essentially removing heat from the air .

这一点很重要，因为空调的核心工作就是去除空气中的热量。

I installed a solar attic fan , which saves me money because I do not run the air conditioner as often .

我安装了一个太阳能风扇，这样我能省下钱，因为不用经常开空调了。

Lastly , if you use a disposable air filter in your air conditioner , be sure to change it at least once every two months .

最后，如果你家的空调用的是一次性空气过滤器，一定要确保至少每两个月更换一次。

On a hot day , a tree can release tens of gallons of water into the air , acting as a natural air conditioner for its surroundings .

在炎热的一天中，一棵树能够释放数万加仑的水分到空气中，对周围环境起到像中央空调一样的作用。