wandering of an arc

例句：

1. 1. The lost child was found wandering in the forest.
   那个迷路的孩子在森林里被找到了。
2. 2. The old man was wandering around the park when he fell over and broke his leg.
   老人在公园里闲逛时摔倒并摔断了腿。
3. 3. He wandered aimlessly through the streets, lost in thought.
   他漫无目的地在街上闲逛，陷入了沉思。