martello tower
definitions
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a type of coastal defense tower built in the 19th century to protect against French invasionzh: 19世纪为防御法国入侵而建造的一种沿海防御塔
examples
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The martello tower still stands as a historical landmark in the coastal town.
这座防御塔仍然矗立在海滨小镇的历史地标中。