名词
中文翻译：堡垒门
同义词：
['fortress gate', 'fortification gate']
例句：
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1. The bunkergate is the main entrance to the underground tunnels.
堡垒门是地下隧道的主要入口。
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2. The soldiers had to pass through the bunker gate to reach the other side of the battlefield.
士兵们必须穿过堡垒门才能到达战场的另一侧。
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3.The bunker gate was heavily guarded by soldiers during the siege.
在围攻期间，堡垒门被士兵严密守卫。