trail spark plug

例句：

1. 1. The hikers followed the trail to the summit.
   徒步旅行者沿着小径走到山顶。
2. 2. The dog found a trail leading to the woods.
   狗找到了一条通往树林的小径。
3. 3. The lost child was found following the trail.
   迷路的孩子顺着小径被找到了。