track fastenings

例句：

1. 1. The police are tracking a suspect in the case.
   警方正在追踪这起案件的嫌疑人。
2. 2. She followed the trail of footprints to find her lost dog.
   她沿着脚印找到了她的丢失的狗。
3. 3. They tracked the scent of the animal and found it hiding in the forest.
   他们追踪了动物的气味，并在森林里找到了它。