pit wood

例句：

1. 1.The pit wood was so rotten that it crumbled easily.
   坑木腐烂得很厉害，很容易就碎掉了。
2. 2. They used the pit wood to build a fire.
   他们用坑木来生火。
3. 3. The locals use pit wood for fuel in their homes.
   当地人用坑木作为家庭燃料。