charcoal可数吗

　　They make the charcoal by burying wood in the ground and then slowly burning it.

　　他们通过把木材埋到地下缓慢燃烧来获取木炭。

　　If the charcoal does fail to light, use a special liquid spray and light it with a long taper.

　　要是木炭确实着不了的话，使用一种特殊的液体喷剂，再用长木片将其点燃。

　　They are stirring huge pots of rice and thin vegetable soup over a fire made of charcoal.

　　他们搅动着架在木炭火堆上的大罐米饭和蔬菜清汤。

　　Darby was looking for a way to improve iron when he hit upon the idea of smelting it with coke instead of charcoal.

　　达比一直在寻找改善铁质的方法，他猛然想到可以不用木炭熔炼，而改用焦炭。