vacuum controlled sparking timing

例句：

1. 1. The vacuum-controlled sparking timingsystem is crucial for the engine'sperformance.
   真空控制的点火时间系统对发动机的性能至关重要。
2. 2. The engineers carefully adjusted the vacuum-controlled sparking timing to optimize theengine's efficiency.
   工程师们仔细调整了真空控制的点火时间，以优化发动机的效率。
3. 3. The newvacuum-controlled sparking timingtechnology promises to improve fuel efficiency andreduce emissions.
   新的真空控制的点火时间技术承诺提高燃油效率并减少排放。