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N-UNCOUNT
煤
Coal is a hard black substance that is extracted from the ground and burned as fuel.
例句
Gas-fired electricity is cheaper than coal...
天然氣發(fā)電比煤便宜。
Today, oil and natural gas have replaced coal and wood in most areas.
如今在大部分地區(qū)，燃油和天然氣已經(jīng)取代了煤炭和木頭。
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N-PLURAL
(燃燒著的)煤塊
Coals are burning pieces of coal.
例句
The iron teakettle was hissing splendidly over live coals...
煤火燒得正旺，上面的鐵茶壺嘶嘶地響個不停。
It is important to get the coals white-hot before you start cooking.
很重要的一點是要把煤塊燒到白熱狀再開始做飯。
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PHRASE
申斥;嚴厲責備
If a person in authority hauls or drags someone over the coals, they speak to them severely about something foolish or wrong that they have done.
例句
I heard later that Uncle Jim had been hauled over the coals for not letting anyone know where we were...
后來，我聽說吉姆叔叔因為不告訴別人我們在哪兒而受到了嚴厲斥責。
The museum's P.R. man was going to be dragged over the coals for sure.
博物館的公關(guān)人員肯定會受到斥責。
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PHRASE
多此一舉;徒勞無功
If someone is taking coals to Newcastle, they are trying to give or sell someone something that they already have a lot of.
例句
Taking a gun to the United States would be like taking coals to Newcastle.
帶把槍去美國簡直是多此一舉。