v. gather in, or as if in, a fort, as for protection or defense
v. station (troops) in a fort
n. 堡垒, 要塞, 易货站
vt. 设要塞保卫
vi. 设要塞
1. The soldiers built a fort to protect the village.
士兵们建造了一座堡垒来保护村庄。
2. We visited an old fort during our trip to the historical site.
我们在游览历史遗址时参观了一座古老的堡垒。
3. The fort was surrounded by a deep moat filled with water.
这座堡垒被一个填满水的深壕沟包围。