由于周四天然气和燃料油的期货暴跌，这个冬天，美国人在能源花销上会省不少钱。
Americans will probably see lower energy bills this winter, as gasoline and heating oil futures also dropped sharply on Thursday.
天然气和煤炭，还有化石燃料，也出现了类似的价格下跌，而且看起来会持续很长时间。
Natural gas and coal—also fossil fuels—have similarly seen price declines that look to be long-lived.
不幸的是，目前石油、天然气和煤炭的低价格可能无法激励研究人员去寻找更便宜的那些燃料的替代品。
Unfortunately, the current low prices for oil, gas, and coal may provide little incentive for research to find even cheaper substitutes for those fuels.
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