Whitworth's variable speed gear

例句：

1. 1. The new car has a Whitworth's variable speed gear that makes it easy to shift gears.
   这款新车配备了惠特沃斯的可变速齿轮，使得换挡变得轻松。
2. 2.The mechanic replaced the old gear with a Whitworth's variable speed gear for better performance.
   技师用惠特沃斯的可变速齿轮替换了旧的齿轮，以获得更好的性能。
3. 3. The driver used the Whitworth's variable speed gear to accelerate quickly and smoothly during the race.
   在比赛中，驾驶员使用了惠特沃斯的可变速齿轮来快速而平稳地加速。