earth path indicator

例句：

1. 1.The earth path indicators are used to help people navigate through the city.
   地球路径指示器用于帮助人们导航穿过城市。
2. 2. The earth path indicators were designed to provide information about the environment.
   地球路径指示器旨在提供关于环境的信息。
3. 3. The earth path indicators helped me find my way back to my hotel.
   地球路径指示器帮助我找到了回酒店的路。