国际石油和天然气价格大跌损害了俄国的预算，而且俄国能源部门多年来投资不足正在造成经济学家们长久以来就预言的产量下降。
The collapse of world oil and gas prices has wounded Russia’s budget, and lack of investment in the country’s energy sector over the years is now causing the declining production that economists have long predicted.