track shim for frost heaving roadbed

例句：

1. 1. Thedetective tracked the suspect to the crimescene.
   侦探追踪嫌疑人到了犯罪现场。
2. 2. Theteam followed the trail of breadcrumbsleft by the thief.
   团队沿着留下的痕迹追踪小偷。
3. 3. The scientists monitored the progressof the experiment.
   科学家们监控实验的进展。