infinitely variable speeds

例句：

1. 1. The car has an infinitely variable speed limiter that can adjust the speed based on the road conditions.
   这辆车有一个可以基于道路条件调整速度的无限可变限速器。
2. 2. The aircraft uses a system of infinitely variable speeds to navigate through complex terrain.
   飞机使用一种系统来在复杂地形中导航，该系统采用无限可变速度。
3. 3.The train's engine is capable of operating at infinitely variable speeds, allowing for smooth and efficient travel.
   火车的引擎能够以无限可变速度运行，从而实现平稳且高效的旅行。