turret

名词 turret:

1. a small tower extending above a building
2. a self-contained weapons platform housing guns and capable of rotation
   同义词：gun enclosure, gun turret

1. An armored protective cylinder around a revolving gun turret on a warship.
   军舰上的露天炮塔军舰上旋转炮塔四周的保护性装甲圆柱体
2. A fortress often has turrets.
   堡垒往往带有塔楼。