CAMBRIDGE – The prices of hydrocarbons, minerals, and agricultural commodities have been on a veritable roller coaster. While commodity prices are always more variable than those for manufactured goods and services, commodity markets over the last five years have seen extraordinary, almost unprecedented, volatility.
坎布里奇——碳氢化合物、原材料和农业商品的价格真称得上是大起大落。商品价格总是比制成品和服务价格波动更大，但过去五年的商品市场波动性之巨颇为反常，可谓前所未有。