timing gear

例句：

1. 1. The car's timing gear is a crucial part of the engine.
   汽车的计时装置是发动机的关键部分。
2. 2.The timing gear was designed to ensure accurate timekeeping.
   计时装置被设计来确保准确的时间测量。
3. 3. Timing gears are used in many mechanical systems to regulate the flow of power.
   计时齿轮在许多机械系统中用于调节动力的流动。