They've evolved a separate caste of armed soldiers who protect the workers. 它们进化出了 一个武装士兵群体来保护工蚁

176. the scout gives one final order.
     全军全力以赴…
177. Charge.
     冲锋
178. The termites are not defenseless.
     白蚁并非毫无防备
179. They've evolved a separate caste of armed soldiers who protect the workers.
     它们进化出了 一个武装士兵群体来保护工蚁
180. Catching an ant, they quickly dismember it.
     它们抓住一只蚂蚁 很快将其分解
181. But these ants have their own specialist weapons.
     但这些蚂蚁也有自己的专用兵器
182. They thrust their venomous stings at their ancient rivals' only weak spot.
     它们将毒刺 刺向它们古老对手的唯一弱点

来自《我们星球上的生命 第一季 第五集 Life on Our Planet S01E05 巨兽阴影下》第 179 行