轧齿边

例句：

1. 1. The gear teeth are designed to fit together perfectly.
   齿轮牙齿设计得完美契合。
2. 2. The machine's gear teeth are worn out from constant use.
   这台机器的齿轮牙齿因持续使用而磨损。
3. 3.The engineer carefully adjusted the gear teeth to ensure smooth operation.
   工程师仔细调整了齿轮牙齿以确保顺畅运行。