than that facing these infants. 正等着这些他们 The caribou mothers now join together, 母驯鹿现在聚集起来 each with an infant exactly the same age. 每只都带着一只同样大小的幼鹿 They're setting off on the greatest 她们准备启程 overland trek made by any animal. 进行陆地上最伟大的长途跋涉...
Within days they will have to keep up with their parents 几天内他们就将跟随自己的父母 on a never-ending march. 踏上无尽的征程 At one day old, they're already faster than an Olympic sprinter. 第一天 他们的速度就已经超过人类短跑健将 They're testing the legs that will carry ...
on a never-ending march. 踏上无尽的征程 At one day old, they're already faster than an Olympic sprinter. 第一天 他们的速度就已经超过人类短跑健将 They're testing the legs that will carry them thousands of miles, 他们正在测试自己跋山涉水用的四肢 better to learn their limitati...
At one day old, they're already faster than an Olympic sprinter. 第一天 他们的速度就已经超过人类短跑健将 They're testing the legs that will carry them thousands of miles, 他们正在测试自己跋山涉水用的四肢 better to learn their limitations now. 最好现在就知道极限在哪里 It may look...
They're testing the legs that will carry them thousands of miles, 他们正在测试自己跋山涉水用的四肢 better to learn their limitations now. 最好现在就知道极限在哪里 It may look playful, but there's no harder life on the grasslands 看起来很好玩 但草原上最艰苦的生活 than that fac...
As the calves appear, 小鹿出生的时候 so too do the leaves of the newly sprouting grass. 也正是青草发新芽的时候 And the calves must strengthen quickly. 幼鹿必须迅速增强体能 Within days they will have to keep up with their parents 几天内他们就将跟随自己的父母 on a never-ending march....
so too do the leaves of the newly sprouting grass. 也正是青草发新芽的时候 And the calves must strengthen quickly. 幼鹿必须迅速增强体能 Within days they will have to keep up with their parents 几天内他们就将跟随自己的父母 on a never-ending march. 踏上无尽的征程 At one day old, they&...
And the calves must strengthen quickly. 幼鹿必须迅速增强体能 Within days they will have to keep up with their parents 几天内他们就将跟随自己的父母 on a never-ending march. 踏上无尽的征程 At one day old, they're already faster than an Olympic sprinter. 第一天 他们的速度就已经超过人...
Caribou females have journeyed to the far north 雌性北美驯鹿远赴北方 to calve. 来此产仔 Over 70,000 caribou babies 超过七万只驯鹿幼崽 will be born in the next few days. 将在几天内出生 As the calves appear, 小鹿出生的时候 so too do the leaves of the newly sprouting grass. 也正是青草...
to calve. 来此产仔 Over 70,000 caribou babies 超过七万只驯鹿幼崽 will be born in the next few days. 将在几天内出生 As the calves appear, 小鹿出生的时候 so too do the leaves of the newly sprouting grass. 也正是青草发新芽的时候 And the calves must strengthen quickly. 幼鹿必须迅速增强体能 W...