fly wheel ring-gear

例句：

1. 1. The flywheel ring-gear is responsible for the smooth operation ofthe engine.
   飞轮齿轮负责发动机的平稳运行。
2. 2. The gearbox in this car hasa high efficiency rating.
   这款车的变速箱效率很高。
3. 3.The drivetrain consists of the engine,transmission, and wheels.
   驱动系统由发动机、变速箱和车轮组成。