track calculating

例句：

1. 1. The car was found on the track after the accident.
   事故发生后，汽车被发现在轨道上。
2. 2. They followed the trail of footprints to find the missing person.
   他们沿着足迹追踪找到了失踪的人。
3. 3. The detective used the tracks left by the suspect to solve the case.
   侦探利用嫌疑人留下的足迹解决了案件。