对低质煤的过度依赖 reliance on low-quality coal
低变质烛煤 subcannel coal
大掺量低质粉煤灰 high-volume low-quality fly ash
质量低劣煤燃烧与哄骗 Tinpot Coal Combustion & Use
泥炭是煤形成的第一阶段，是一种低质煤。
Peat, the first stage in the formation of coal, is a low-rank material.
褐煤：一种低质煤，往往保存着原来的木质结构，高水分，低热值，干燥后龟裂严重。
Brown coal: a low-grade coal which commonly retains the structures of the original wood. It is high in moisture, low in heat value and checks Badly upon drying.
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