基本解释n.防御工事名词fortification的复数形式.同根派生 英汉例句用作名词 (n.)The fortifications were out of repair.防御工事年久失修。The Union built fortifications, gathered up troops, and planned Hood's demise.联邦军队已经在那里建好防御工事，并且集结军队，准备一举击溃虎德的军队。