fortresses
n. 堡垒（fortress 的复数）；要塞
v. 在……设置堡垒（fortress 的第三人称单数形式）
例句
Within days, the Gothamite occupation has built a series of sea fortresses.
几天之内，占领地盘的哥特人就建立了一系列的海上堡垒。
Constructing nuclear fortresses was not an easy task.
建造防核堡垒并不是一件容易的事。
They would patrol the collapsing cities, usually in motorcades, and then return to their fortresses.
他们以车队巡逻废墟中的城市，然后回到堡垒。
