We wanted to reduce the cost of heating and air-conditioning.

我们想减少供暖与空调的开支。

《柯林斯英汉双解大词典》

To reduce the cost, they learn to bargain with the farmers.

为了减少成本，他们学会了跟农民讨价还价。

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How to Reduce the Cost of Creating High-Quality content?

如何降低优质内容的成本？

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The changes are expected to cost about nine hundred forty billion dollars over ten years, but also help reduce the federal budget deficit.

VOA: special.2010.03.24

So, the optimal thing to do if you live in a world like this n is to get n as large possible and you can reduce the standard deviation of the portfolio very much and there's no cost in terms of expected return.

如果现实中也这样简单的话,那么你就尽量增大,这样就能让投资组合的标准差,就会大大降低,从预期收益率的角度来看,这样做的成本是零。

耶鲁公开课 - 金融市场课程节选

Speaking to journalists Tuesday, he reiterated the Democratic Party of Japan's campaign promise to increase child allowances, reduce the cost of education, and cut the gasoline tax.

VOA: standard.2009.10.27

The team is currently trying to reduce the cost this adds to the process.

BBC: Key test for re-healable concrete

The railways are seeking tax breaks and other subsidies to reduce the cost of complying.

ECONOMIST: American railways

Looking further ahead, a faster pace requires reforms to reduce the cost of pensions and employment.

ECONOMIST: Brazil's presidential election