This mother and her cubs
在冬季冰封海面之前
may well not get another meal
這位母親和她的寶寶
until the sea freezes again in winter.
很可能無法捕到獵物
There's not much to eat on land
陸地上的食物稀少
and the fact is that the longer the cubs
而且 海面重新冰封前
have to wait until the ice returns,
熊寶寶們要等待的時間越長
the more likely they are to die.
存活的可能性就越小
Longer summers with no ice are probably
無冰層覆蓋的夏季時間逐漸延長
the main reason why many polar bear
這大概是許多北極熊種群
populations are dropping.
數(shù)量下降的主因
To help monitor bears into the future,
為了輔助監(jiān)控北極熊的未來動態(tài)
this female is being fitted with a radio collar
這只母熊頸上裝了無線電項圈
to track her movements.
以便追蹤她的活動
It's an extraordinary sensation to be so close
與如此強壯的動物近距離接觸
to such a powerful animal.
感受甚為奇妙
With luck, carrying that collar,
母熊配有項圈 幸運的話
she will have more years to go yet,
她能存活許多年
and be telling us a great deal about herself
告訴我們她自己的許多事
and the rest of the race of polar bears,
還有整個北極熊群種的故事
as they face this very uncertain future.
告訴我們 他們?nèi)绾蚊鎸@未知的未來
The future of the ice cover on the sea
海面冰層的變化
isn't just an issue for the animals.
不僅僅關系到動物
It's a big concern for the people
同時也關乎那些
who live in the Arctic
住在北極
and travel across the ice every day.
每天在冰上世界穿梭的人類