名词
中文翻译：堡垒
同义词：
['fortress', "stronghold例句：1. The ancient fortress was a symbol of the kingdom's strength.（这个古老的要塞是王国力量的象征。）"]
例句：
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1. The ancient fortress was a symbol of the kingdom's strength.
这个古老的要塞是王国力量的象征。
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2.The stronghold of the rebels was hidden deep in the forest.
叛军的要塞隐藏在森林深处。
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3. The fortress was surrounded by a moat and walls that were impenetrable.
要塞被护城河和坚不可摧的城墙包围。