tool major cutting edge

例句：

1. 1. He uses a hammer to build houses.
   他用锤子建造房屋。
2. 2. The carpenter needs a saw to cut the wood.
   木匠需要一把锯来锯木头。
3. 3. The chef uses knives as tools for cutting vegetables.
   厨师用刀作为切蔬菜的工具。