footstep pivot

例句：

1. 1.The detective followed the trail of footsteps to find the thief.
   侦探沿着脚印追踪到小偷。
2. 2. He had been walking for hours, leaving only a few faint footsteps in the snow.
   他走了几个小时，只留下了几个在雪地上的模糊脚印。
3. 3. The hikers were amazed at the beauty of the forest and the fresh footsteps they left behind.
   徒步旅行者对森林的美丽和他们留下的新鲜足迹感到惊讶。