tachometer chronograph

例句：

1. 1. The engineer used a tachometer to measure the time it took for the car to reach the destination.
   工程师使用计时器测量汽车到达目的地所需的时间。
2. 2. The chronograph on his watch is accurate to within a few seconds.
   他手表上的计时器非常准确，误差只有几秒钟。
3. 3. The chronograph was designed to be easy to read and operate.
   这款计时器设计得易于阅读和操作。