coal可数、不可数都可以用,根据情况不同区分。

coal：n.煤;(尤指燃烧着的)煤块。

coals：n.煤;(尤指燃烧着的)煤块，coal的第三人称单数和复数。

扩展资料

I put more coal on the fire.

我往火里再加了些煤。

Demand for coal is down and so are prices

煤的需求下降了，煤价也相应下跌。

A hot coal fell out of the fire and burnt the carpet.

一块燃烧着的煤块从火炉里掉出来把地毯烧了。

It is important to get the coals white-hot before you start cooking.

很重要的一点是要把煤块烧到白热状再开始做饭。

Red-hot coals glowed in the fire.

炽热的煤炭在炉子里发光。

Taking a gun to the United States would be like taking coals to Newcastle.

带把枪去美国简直是多此一举。