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油价变化无常,常常使人们大跌眼镜。下世纪的油价究竟会走高还是走低,人们很难作出准确预测。尽管如此,对下世纪原油价格的总体变化趋势加以分析却仍是很有必要的。
Volatile oil prices often make people stunned. Whether oil prices will go up or down in the next century will make it hard to make accurate predictions. Nevertheless, it is still necessary to analyze the overall trend of crude oil prices in the next century.