differential planet gear

例句：

1. 1. The differential planet gear is crucial for the smooth operation of the vehicle's transmission system.
   差速行星齿轮对于车辆传动系统的平稳运行至关重要。
2. 2.The differential planet gear is designed to reduce wear and improve efficiency in high-speed applications.
   差速行星齿轮设计用于减少磨损并提高高速应用的效率。
3. 3. In order to optimize performance, engineers often adjust the differential planet gear ratios.
   为了优化性能，工程师经常调整差速行星齿轮的比率。