saw notch

例句：

1. 1.The saw cut a deep notch in the wood.
   锯子在木头上切出了一个深的缺口。
2. 2. The carpenter used a saw to make a notch for the hinge.
   木匠用锯子为铰链做了一个缺口。
3. 3.The hunter found a notch in the tree that led to a hidden cave.
   猎人在树中发现了一个缺口，通往一个隐蔽的洞穴。