As the chart below shows, their prices have risen and fallen in step in recent years.

正如下面的图表显示，过去几年，它们的价格都是同步上涨和下跌的。

youdao

Reserves of oil and minerals have grown; their prices have not increased; and demand for materials like copper are not exponential.

石油和矿物的储量增加了，而它们的价格却没有增加；同时，对某些原材料的需求，比如铜，并未呈指数增长。

youdao

SINCE 2004 sales by volume of LCD flat-panel screens, used in televisions, computers and mobile phones, have increased tenfold, and their prices have fallen by three-quarters.

从2004年起，用于电视、电脑和手机的液晶平板显示器出售量按体积计涨了十倍，同时价格下降了75%。

youdao

The situation is when farmers have to sell their produce at low prices after harvest, when supplies are greatest.

VOA: special.2009.11.17

A statement noted that while food prices have decreased from their peak last year, they remain high in historical terms.

VOA: special.2009.07.11

Oil prices have collapsed from their record highs of last year.

VOA: special.2009.03.02

Both their prices have been dwarfed by the multimillion-dollar sums fetched by fellow contemporary artists like Richard Prince or Christopher Wool.

WSJ: In the Art World, Women on the Verge

The chart shows that Italian bond yields appear to have bottomed at 4%, and are now edging higher as their prices have declined.

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No to commodities, although their prices have been surging.

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