[00:01:10]This mother and her cubs

在冬季冰封海面之前

[00:02:44]may well not get another meal

这位母亲和她的宝宝

[00:04:39]until the sea freezes again in winter.

很可能无法捕到猎物

[00:08:39]There's not much to eat on land

陆地上的食物稀少

[00:10:46]and the fact is that the longer the cubs

而且 海面重新冰封前

[00:12:35]have to wait until the ice returns,

熊宝宝们要等待的时间越长

[00:14:56]the more likely they are to die.

存活的可能性就越小

[00:20:26]Longer summers with no ice are probably

无冰层覆盖的夏季时间逐渐延长

[00:23:05]the main reason why many polar bear

这大概是许多北极熊种群

[00:25:22]populations are dropping.

数量下降的主因

[00:27:04]To help monitor bears into the future,

为了辅助监控北极熊的未来动态

[00:37:52]this female is being fitted with a radio collar

这只母熊颈上装了无线电项圈

[00:40:38]to track her movements.

以便追踪她的活动

[00:46:39]It's an extraordinary sensation to be so close

与如此强壮的动物近距离接触

[00:50:35]to such a powerful animal.

感受甚为奇妙

[00:52:52]With luck, carrying that collar,

母熊配有项圈 幸运的话

[00:55:39]she will have more years to go yet,

她能存活许多年

[00:59:29]and be telling us a great deal about herself

告诉我们她自己的许多事

[01:03:39]and the rest of the race of polar bears,

还有整个北极熊群种的故事

[01:06:26]as they face this very uncertain future.

告诉我们 他们如何面对这未知的未来

[01:11:36]The future of the ice cover on the sea

海面冰层的变化

[01:19:43]isn't just an issue for the animals.

不仅仅关系到动物

[01:21:33]It's a big concern for the people

同时也关乎那些

[01:24:37]who live in the Arctic

住在北极

[01:25:54]and travel across the ice every day.

每天在冰上世界穿梭的人类