When migrating red crabs march into their territory, 当迁徙的红蟹经过它们的领地时

253. They escape from visiting ships, and with no predators
     它们搭乘来访的船只来到岛上 由于缺乏天敌控制
254. to control them, they have now created vast
     它们在森林里建立了
255. super colonies in the forest.
     巨大的超级蚁群
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

来自《行星地球 第二季 第一集 Planet Earth S02E01 岛屿》第 256 行