炮台

例句：

1. 1. The ancient city has manyold gunpowder towers that arestill standing today.
   这个古城有许多仍然屹立的古代火药塔。
2. 2. The soldiers were trainedto use the guns on the battery.
   士兵们被训练使用炮台上的火炮。
3. 3. Thefortress was built to protect thecity from invaders.
   这座堡垒是为了保护城市免受侵略者侵袭而建造的。