footprinting

例句：

1. 1. The detective was able to trace the criminal's footsteps and apprehend him.
   侦探能够追踪犯罪分子的足迹并将其逮捕。
2. 2.The hikers followed the trail of the river as they trekked through the forest.
   登山者沿着小溪的踪迹徒步穿越森林。
3. 3.The scientist used a microscope to trace the footprints of the animal in the snow.
   科学家使用显微镜来在雪中追踪动物的足迹。