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The gray wolf once had the largest distribution of any mammal beside humans and they're highly intelligentpredators.
灰狼曾經(jīng)是除了人類之外分布范圍最廣泛的哺乳動(dòng)物，它們也是具有高智商的掠食者。
Most gray wolves stay within the territory where they were born.
大多數(shù)灰狼只在它們的出生地附近活動(dòng)。
But in some parts of the tundra, gray wolves must travel great distances to survive.
但在苔原上的某些地方，灰狼必須遠(yuǎn)距離活動(dòng)才能夠生存。
This wolf pack is following the reindeer tracks out of the taiga forest onto the icy plains of the tundra. And when they find the herd, the hunt will be on.
這群狼正跟隨著馴鹿的足跡走出泰加林地來到冰冷的苔原之上。而當(dāng)它們發(fā)現(xiàn)馴鹿群時(shí)，捕獵就會(huì)開始。
The gray wolf is one of the deadliest killers on the planet.
灰狼是地球上最致命的掠食者之一。
They regularly take down bison six times their size. But here on the Arctic tundra, reindeer are their stable food.
它們經(jīng)常制伏六倍于自己體型的北美野牛，但在這北極苔原上，馴鹿就是它們的主食。
With up to ten wolves close in, the pack tries to split the herd.
多至十頭狼迫近馴鹿群，試圖將它們分開。
If they can separate them, they can identify the weak.
一旦將馴鹿群分開，它們就可以找出體弱的馴鹿。
The reindeer try desperately to stay together, but the wolves conserve energy, waiting for their moment to strike.
馴鹿們竭力地保持不被沖散，但狼群保存著體力伺機(jī)發(fā)動(dòng)攻擊。
Each wolf requires an average up to four and half kilograms of meat a day and this pack must make a kill every few days.
每頭狼每天平均需要四點(diǎn)五公斤的肉食，所以這群狼必須每隔幾天就捕獵一次。
Having finally split the herd, the wolves close in.
終于分開了馴鹿群，狼群開始逐漸迫近。
The hunt is on. The reindeer must stay together.
捕獵開始了，馴鹿們必須聚在一起。
This young female separates from the herd.
而這頭年輕的雌鹿卻脫離了鹿群。
A reindeer could easily outrun one wolf, but the wolf pack is working together.
一頭馴鹿可以輕身地跑羸一頭狼，但狼群是協(xié)同作戰(zhàn)的。
