With the herd retreating to water, the bear must move quickly. 象群开始往水里撤退,熊必须迅速出击

253. Not here!
     不在这里
254. This female walrus is shielding her pup, if he can just prise her off...
     雌海象在保护它的小象 如果能够把它拉开的话…
255. The bear's claws and teeth can't penetrate her thick hide.
     但熊的尖牙利爪都无法穿透海象厚实的毛皮
256. With the herd retreating to water, the bear must move quickly.
     象群开始往水里撤退,熊必须迅速出击
257. Having failed with one, he heads straight for another.
     一个失败后 它又径直奔向另一个
258. The chance of his first meal in months is slipping away.
     挨饿几个月后吃到第一顿饭的希望正变得越来越渺茫
259. He seems increasingly desperate.
     看起来它变得越来越拼命

来自《行星地球 第一季 第六集 Planet Earth S01E06 冰雪世界》第 256 行