and it could sustain her for days. 这顿美餐能让她支撑数日
It's winter, and food is desperately short. 时至冬季 食物极度匮乏
All it can do is wait for one to slip and fall. 只能等待某只羱羊失蹄跌落
and they're now almost as sure-footed as their parents. 现在几乎可以和双亲一样如履平地了
And it certainly can't follow them up here. 显然它也无法追上峭壁
they have had to adapt both their body and their behaviour in order to survive. 为了生存 他们必须从体型和行为上 充分适应环境
Lethally cold, scoured by gales and blizzards, 在极端低温与暴风雪的洗礼下
and only the toughest animals can endure. 只有生命力最顽强的动物可以忍受
but, for one and a half million penguins, 但是对于一百五十万只企鹅来说