raw coal[矿物] 原煤;元煤;普通煤;没有经过筛
Black Coal白日焰火;黑煤;烟煤;黑煤炭
Coal ash[环境] [矿业] 煤灰;粉煤灰;粉煤灰综合利用
coal mill煤磨机;煤磨;中速磨煤机
coal car煤车;运煤车;装煤车;运煤车辆
coal facepump矿井工作面泵;矿井工作面;矿井事人情泵
boghead coal[矿物] 藻煤;泥煤;沼块煤
coal carbonization煤之碳化;焦化;煤干馏;煤的干馏
Coal mansion煤炭大厦
N-UNCOUNT（不可数名词） Coal is a hard, black substance that is extracted from the ground and burned as fuel. 煤
Gas is cheaper than coal.
煤气比煤便宜。
N-PLURAL（复数型名词） Coals are burning pieces of coal. 燃烧着的煤块
The iron teakettle was hissing splendidly over live coals.
铁茶壶在熊熊燃烧着的煤块上“嘶嘶”作响。