final gear reduction

例句：

1. 1. The car's final gear reduction is set to 2, which means it can go up to 20 miles per hour.
   汽车的最终齿轮减速设置为2，这意味着它可以达到每小时20英里。
2. 2. The engineer adjusted the final gear reduction to improve the car's performance.
   工程师调整了最终齿轮减速以提高汽车的性能。
3. 3. During the race, the driver had to make several adjustments to the final gear reduction to stay ahead ofthe competition.
   比赛中，驾驶员不得不多次调整最终齿轮减速以保持领先。