The calf must stay close to its mother to avoid getting lost in the sudden blizzard. 小牛必须紧跟着母亲 才能避免在突如其来的暴风雪中迷路
But half a ton of mad hairy cow is not to be trifled with. 不过在半数是脾气暴躁的母牛面前不好硬来
For the fox, it's a chance to scavenge. 对于北极狐来说 这是一个捕食的机会
These giants have the strength to smash through the frozen crust 这种体型巨大的动物有足够的力量砸出冰窟窿
As the current begins to build, it's up, up and away. 洋流开始转强时它们就只好远走高飞了
The ducks must quickly prise the mussels free before the tide starts to turn. 绒鸭必须赶在潮流转向之前迅速采食
and, when day breaks, a rare chance to feed. 而且到了白天还有难得的进食机会
instead of flying south to warmer climes. 而一直坚守在这里经受着北方寒冬的考验