two stars navigation

例句：

1. 1.We used to rely on the stars for navigation during the night.
   我们过去在晚上依靠星星进行导航。
2. 2. The two stars in the sky are a good reference for navigation.
   天空中的两颗星星是一个很好的导航参考。
3. 3. The two stars in the sky can be used as a guide for navigation.
   天空中的两颗星星可以作为导航的指南。