动词
中文翻译：建造要塞
同义词：
['fortify', 'fortress']
例句：
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1. The ancient city was once a thriving hub of trade and culture, but now it's a forgottenrelic of the past.
这个古城曾经是一个繁荣的贸易和文化中心，但现在它已经成为了被遗忘的过去遗迹。
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2.The army was forced to retreat from the battlefield, leaving behind a stronghold of defense.
军队被迫从战场撤退，留下了一个坚固的防御要塞。
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3. The government decided to fortify the border with new walls and gates.
政府决定用新的城墙和大门加固边境。