天然焦,天然焦炭;
As more coal was put in the stove, the fire burnt up again.
炉子里添了煤,炉火又重新燃烧起来。
She spent her days hunting in the ash heaps for half-burnt coal-balls to take home for fuel.
她整天在煤灰堆捡煤核,拿回家去烧。
study on the production of composite portland cement with burnt coal waste, aluminium sulfate and zeolite
用自然煤矸石、硫酸铝渣及沸石生产复合水泥
Gas, coal and oil are burnt to produce electricity.
气体, 煤和石油燃烧后产生电.
The coal was burnt to cinders.
煤烧成了灰.
A hot coal fell out of the fire and burnt the carpet.
火炉里掉出一块炽热的煤把地毯烧了.
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