可解释的

The enemy forces found the fort expugnable, so they decided to attack it immediately.
敌军发现要塞可以被攻占，于是决定立即发动攻击。
The city's defenses were so weak that it was considered expugnable by neighboring states.
这座城市的防御如此薄弱，被视为邻国可以攻占的城市。
The pirate fleet easily managed to expugnable the merchant ship, capturing its cargo and crew.
海盗舰队轻易地攻占了商船，夺取了其货物和船员。
The strategy of the invading army was to first expugnable the surrounding villages before attacking the main city.
入侵军队的战略是首先攻占周围的村庄，然后再攻打主要城市。
The castle was considered expugnable due to its strategic location and strong walls, making it difficult for enemies to conquer.
由于城堡的位置战略性和坚固的城墙，它被认为是难以攻占的，敌人很难征服它。
The government has invested heavily in modernizing the military, ensuring that no foreign power can consider our nation expugnable.
政府在现代化军事方面投入大量资金，确保没有任何外国势力会认为我国是可以被攻占的。
Despite the fortress's formidable appearance, it proved to be expugnable when the enemy's superior tactics were applied.
尽管堡垒看起来非常坚固，但在敌人使用更高级的战术时，它被证明是可以被攻占的。
The rebels successfully expugnable the government's stronghold, marking a significant turning point in their struggle for freedom.
叛乱者成功攻占了政府的要塞，标志着他们争取自由斗争中的一个重大转折点。
The ancient city, with its crumbling walls and overgrown streets, still managed to hold its own against potential invaders, proving not to be expugnable.
这座古老的城池，虽然城墙残破，街道荒芜，但仍能抵御潜在的入侵者，证明它并非易攻之敌。
The innovative defense system installed in the new fortress made it virtually expugnable, deterring any potential attackers.
新要塞安装的创新防御系统使其几乎无法被攻占，阻止了任何潜在的攻击者。