sawing pattern

例句：

1. 1. He used a saw to cut the wood into pieces.
   他用锯把木头切成了块。
2. 2. The carpenter was sawing wood for the new house.
   木匠正在为新房子锯木。
3. 3. The old man was sawing wood in his workshop all day long.
   老汉在工作坊里整天锯木头。