wood pitch

例句：

1. 1.The wood is too wet to burn easily.
   这木头太湿了，不容易燃烧。
2. 2.He used charcoal to light the fire.
   他用木炭来生火。
3. 3.The charcoal powder was used as a fuel for the stove.
   木炭粉被用作炉子的燃料。