cam shaft

例句：

1. 1. The engine's performance is directly related to the quality of its cam shaft.
   发动机的性能与凸轮轴的质量直接相关。
2. 2. The engineer carefully inspected the cam shaft for any signs of wear or damage.
   工程师仔细检查了凸轮轴，以查看任何磨损或损坏的迹象。
3. 3. The new design uses a more efficient cam shaft that reduces fuel consumption.
   新设计使用了更高效的凸轮轴，从而减少了燃油消耗。