gear pair with non-parallel non-intersecting axes

例句：

1. 1. Thecar's engine is running smoothly becausethe gears are properly adjusted.
   汽车的引擎运行平稳，因为齿轮调整得当。
2. 2. The train has a large number ofgears to make it possible to travelover long distances.
   火车有很多齿轮，使得它能够进行长途旅行。
3. 3. The machineuses gears to turn its wheels andmove them in different directions.
   这台机器使用齿轮来转动轮子并使其在不同方向移动。