风能电的价格也从1970年代的每瓦特2美元降至如今的5-8美分，而煤电也不过2-4美分。
The price of wind power has fallen from $2 per kilowatt hour in the 1970s to 5-8 cents now, compared with 2-4 cents for coal-fired power.
试验结果表明，经过哈氏可磨性测定仪后，各煤种的工业分析都发生了不同程度的变化，而煤粉破碎后的粒度分布取决于煤种的煤化程度，而与煤种的可磨性指数相关性较小。
The results(indicated) that the approximate analysis of the pulverized coal changed to different degrees, and the particle size distribution mainly depended on the coal rank but not the HGI.
波兰90%的用电都是通过煤而得来。
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