lighthouse：灯塔；建在海岸、岛屿或港口附近的高塔，用强光为船只指引航道、警示危险（如暗礁、浅滩）。
/ˈlaɪtˌhaʊs/
The lighthouse guided the boats safely into the harbor.
灯塔引导船只安全驶入港湾。
After days at sea, they finally spotted the lighthouse, a steady beam cutting through the fog and reminding them they were close to home.
在海上漂泊数日后，他们终于看见了灯塔——一道稳定的光束穿透浓雾，提醒他们离家已不远。
lighthouse由 light（光）+ house（房子/建筑）构成，字面意思是“装着光的房子/塔”。早期英语中用这种直观的复合词来命名为航海提供光源指引的建筑。
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