n.碉堡，围墙，炮台，防御工事，筑城，设防，加强
fortification的复数

原形：fortification

The ancient city walls were the main fortifications of the city.
古老的城市城墙是该城市的主防御工事。
The castle was surrounded by a deep moat and high walls as its fortifications.
城堡周围有深护城河和高墙作为其防御工事。
The soldiers were trained in the use of various fortifications for protection.
士兵们接受了如何使用各种防御工事的训练以进行保护。
During the war, the town relied heavily on its fortifications for defense.
在战争期间，城镇主要依赖其防御工事进行防卫。
Modern cities have moved away from traditional fortifications to more advanced security measures.
现代城市已经从传统的防御工事转向了更先进的安全措施。
The enemy attempted to breach our fortifications but failed due to our strong defenses.
敌人试图攻破我们的防御工事但失败了，因为我们的防御很坚固。
Archaeologists uncovered evidence of ancient fortifications during an excavation.
考古学家在挖掘过程中发现了古代防御工事的证据。
The fortress was built with thick walls and towers as its fortifications.
这座堡垒用厚厚的墙壁和塔楼作为防御工事建造。
The general ordered his troops to construct additional fortifications before the battle.
将军命令他的部队在战斗前建造额外的防御工事。
The old fort had been restored and now served as a museum showcasing historical fortifications.
这座旧堡垒已经被修复，现在作为一个展示历史防御工事的博物馆。