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But there is food to be had on these remote shores.
但這座偏遠海岸上，確實有食物可以吃。
A walrus colony... 2,000 strong.
海象聚落，兩千多只海象。
The walruses panic. And there are casualties.
這些海象陷入恐慌。有些的確無法逃過一劫。
Fights break out.
戰斗開始了。
This is no place for a young family.
年輕家庭沒有一席之地
The mother calls her cubs away. They must search elsewhere.
母熊叫幼熊離開。它們必須另尋他處。
Grass is a poor meal for a growing cub.
對于成長中的幼熊，草僅能糊口充饑。
And starvation in summer is a real threat.
而且饑荒在夏天是個嚴重威脅。
But this opportunity to feed is one she cannot afford to ignore. It's time to gamble.
但它不得不把握這個進食機會。只能孤注一擲了。
Her cubs follow her. She urges them to stay back.
它的幼熊尾隨它。它極力阻止它們前進。
The males are twice her size. But, preoccupied with feeding, they tolerate her presence.
公熊的體型是它的兩倍大。但因忙于進食，而容忍它的存在。
The distress calls of her cubs, however, attract unwelcome attention.
幼熊的著急呼叫卻吸引了不速之客。
Their mother rushes to shield them with her body.
它們的母親連忙趕回去，以身體保護它們。
But she seems torn between guarding her family and feeding herself.
但它看來在保護家人和喂飽自己之間掙扎。
Cubs left by themselves are easy prey for a hungry male bear.
失去照顧的幼熊是饑餓公熊的易捕獵物。
But now her maternal instincts take over.
但現在，它的母性直覺覺醒了。
Faced with a mother's fury, the dominant male backs down.
強勢的公熊在面對母親的憤怒后退卻。
Having fought her way in, her cubs can now feed for the first time in weeks.
因為它勇往直前抵抗，它的幼熊得以在數周后首度飽餐一頓。
Polar bears were once the supreme hunters on the sea ice.
北極熊曾是海冰上最優秀的狩獵者。
Now, each summer, more and more of them have to come to land in search of food.
如今每年夏天，越來越多的北極熊必須來到陸地覓食。
Whether the ice bear survives into the next century depends on what happens to the sea ice on which they rely.
冰上之熊能否生存到下個世紀，取決于它們所仰賴的海冰發展狀態。
As with all of the arctic ocean's remarkable wildlife,
所有北極的珍貴野生動物都是如此，
it's how the climate changes over the coming years that will determine their future.
往后數年內的氣候改變將決定它們的未來。
