time comparator

例句：

1. 1. The engineer used a timecomparator to compare the two machines' performance.
   工程师使用了一个时间比较器来比较两台机器的性能。
2. 2. The timecomparator helped us determine the optimaltime for starting the project.
   时间比较器帮助我们确定了项目的最佳启动时间。
3. 3. The timecomparator showed that the new machinewas faster than the old one.
   时间比较器显示，新机器比旧机器快。