coal意为煤块时可数吗

coal

n. 煤；（尤指燃烧着的）煤块；木炭

v. 供煤；采煤，提炼煤；把……烧成炭；加煤

coal指煤的时候不可数；指煤块（尤其是燃烧着的煤块）时可数。

例句

Coal and steel were the region\'s lifeblood.

煤炭和钢铁曾是这个地区的.生命线。

The average coal seam here is three feet thick.

这里的煤层平均为3英尺厚。

The power stations burn coal from the Ruhr region.

这些电厂烧产自鲁尔地区的煤。

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。