The crabs have no defence. 红蟹毫无还手之力

256. When migrating red crabs march into their territory,
     当迁徙的红蟹经过它们的领地时
257. the ants attack.
     黄疯蚁便展开攻击
258. Squirting acid into the crabs' eyes and mouths.
     它们朝红蟹的双眼和嘴中喷射酸液
259. The crabs have no defence.
     红蟹毫无还手之力
260. Blinded and confused, they're doomed.
     双目失明 迷失方向 它们便死定了
261. Humans brought these ant invaders here,
     是人类把这些蚂蚁入侵者带上了岛
262. and now humans are having to control them.
     而现在人类不得不采取措施控制局面

来自《行星地球 第二季 第一集 Planet Earth S02E01 岛屿》第 259 行