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煤礦科技英語——1. INTRODUCTION
Coal,acombustibleorganicrock[1]composedprimarilyofcarbon,hydrogen,andoxygen[2].Coalisburnedtoproduceenergyandisusedtomanufacturesteel.Itisalsoanimportantsourceofchemicalsusedtomakemedicine,fertilizers...
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煤礦科技英語——2. MODERN USES OF COA
Eighty-sixpercentofthecoalusedintheUnitedStatesisburnedbyelectricpowerplants[1]toproduceelectricity.Whenburned,coalgeneratesenergyintheformofheat.Inapowerplantthatusescoalasfuel,thisheatconvertswateri...
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煤礦科技英語——3. FORMATION AND COMPONENTS OF COAL
Coalisasedimentaryrock[1]formedfromplantsthatflourishedmillionsofyearsagowhentropicalswamps[2]coveredlargeareasoftheworld.Lushvegetation[3],suchasearlyclubmosses[4],horsetails[5],andenormousferns,thri...