信标

例句：

1. 1.The police used a red light as abeacon to guide the lost hikers back to safety.
   警察用红灯作为信标来引导迷路的徒步旅行者安全返回。
2. 2. The old map isstill a useful landmark for navigating through the forest.
   旧地图仍然是在森林中导航的一个有用的地标。
3. 3. Theship's beacon was abeacon of hope for the crewduring the storm.
   船的灯塔是船员们在暴风雨期间的希望之源。