tach

例句：

1. 3.
   在计算机术语中
2. 1. The car's tachometer is showing a speed of 60 miles per hour.
   汽车的转速表显示速度为每小时60英里。
3. 2. The clock has a tachometer that shows the time in seconds.
   这个时钟有一个计时器，显示的是秒数。
4. 3. The computer has a tachometer that measures the amount of data it can handle.
   这台电脑有一个计时器，用来测量它能够处理的数据量。