guiding star

例句：

1. 1.The guiding star in the sky always points us in the right direction.
   天空中的北极星总是指引我们前进的方向。
2. 2.The navigator on the ship used to use a guiding star to navigate.
   船上的领航员过去常常使用一颗导航星来导航。
3. 3. She followed the guiding star as she walked along the beach.
   她在沿着海滩散步时跟随那颗引导星。