指路明灯

例句：

1. 1. The old lighthouse is still standing, but it's not used anymore.
   那座古老的灯塔仍然矗立着，但已经不再使用了。
2. 2. He was a beacon of hope for many people in need.
   他是许多人在困难中寻求希望的灯塔。
3. 3. The lighthouse was the only thing that guided them back to safety.
   灯塔是唯一指引他们安全返回的东西。