straight spur gear teeth

例句：

1. 1.The straight spur gear teeth on the car's transmission are responsible for shifting gears smoothly.
   汽车变速箱上的直齿齿轮负责平稳地换挡。
2. 2. In the manufacturing process, the straight spur gear teeth are used to transfer power from one shaft to another.
   在制造过程中，直齿齿轮用于将一个轴的动力传递到另一个轴。
3. 3.The straight spur gear teeth in the gearbox ensure that the vehicle can move forward smoothly and efficiently.
   齿轮箱中的直齿齿轮确保车辆能够平稳且高效地前进。