Prices change according to supply and demand.

价格根据供应量和需求量而变化。

《柯林斯英汉双解大词典》

Growth Rate of Per Capita disposable income was excluded prices change.

人均可支配收入增长扣除价格变动因素。

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The European economists found that retail prices change every four or five quarters.

欧洲的经济学家们发现，欧元区的零售价每四到五个季度才变动一次。

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Indeed,volatile food prices, population growth, low agricultural productivity and the potentially devastating effects of climate change make it a particularly daunting challenge. The IFAD president says over the past 30 years, agricultural productivity in developing countries has been stagnant or in decline. He blames it on years of under-investment.

VOA: standard.2010.03.29

But then developments in other fields can change the relative prices and suddenly make an idea that had been hypothetical and unapplied suddenly work well.

而其他领域的发展,改变了相对价格,过去那些看似空想,而且不切实际的主意,就突然间变得可行了

耶鲁公开课 - 金融市场课程节选

Of course, this was just a change in stock prices; it wasn't related to any fundamental change in the economy or any fundamental change in corporate prospects.

当然,这只是股价上的变化,整个经济或是各个上市公司,并没有发生根本的变化

耶鲁公开课 - 金融市场课程节选

They tend to modify their consumption patterns when prices change, even if their purchasing power doesn't.

FORBES: Magazine Article

Stock prices change every day and are subject to all manner of emotion and trivial news flow.

FORBES

The European economists found that retail prices change every four or five quarters.

ECONOMIST: Economics focus