stepless gear

例句：

1. 1. The car has a stepless gear, which makes it easy to shift gears without having to manually change the gears.
   这辆车有无级变速器，这使得在不手动换挡的情况下轻松切换档位。
2. 2. The new model of the car features a stepless gear, offering more efficiency and smoother drivingexperience.
   这款新车配备了无级变速器，提供了更高的效率和更流畅的驾驶体验。
3. 3.In some applications, such as in heavy-duty machinery, stepless gear is used to improve the performance and reduce wear and tear on the equipment.
   在某些应用中，如重型机械，使用无级变速器可以提升性能并减少设备磨损。