名词

1.不可数名词：煤，木炭

2.可数名词：煤块

不及物动词：

加煤

词形变化

时态coaled，coaling，coals

英语解释

supply with coal

burn to charcoal

a hot fragment of wood or coal that is left from a fire and is glowing or smoldering

fossil fuel consisting of carbonized vegetable matter deposited in the Carboniferous period

take in coal