sawdust

例句：

1. 1. The builders were busy sanding the wooden floor.
   建筑工人正在忙着打磨木质地板。
2. 2. The old house was filled with sawdust and dust.
   旧房子充满了锯末和灰尘。
3. 3. The carpenter used sawdust to clean the wood.
   木匠用锯末来清理木头。