CAMBRIDGE – Oil prices have plummeted 40% since June – good news for oil-importing countries, but bad news for Russia, Venezuela, Nigeria, and other oil exporters. Some attribute the price drop to the US shale-energy boom.
美国剑桥&mdash;6月以来，石油价格暴跌40%&mdash;&mdash;这对石油进口国来说是好消息，但对俄罗斯、委内瑞拉、尼日利亚和其他石油出口国来说是坏消息。一些人将油价下跌归因于美国页岩能源的爆发。也有人认为这是因为欧佩克没有就削减供给达成一致。