Yeah, polar bears OK, have you ever seen a polar bear?

对，北极熊。你见到过吗？

Polar bears prefer seals for their meals.

北极熊最爱吃海豹。

This is a disaster for polar bears.

对于北极熊而言，这是一场灾难。

We see polar bears as a sentinel of climate change.

“我们将北极熊看作气候变化的哨。

" And try not to meet any polar bears."

“尽量不要碰上北极熊。”

Oh, dear. That polar bear's got the snuffles.

哦，天呐。那只北极熊抽鼻子。

Polar bears nurse their cubs for almost eight months.

北极熊会喂养它们的幼崽将近八个月。

Polar bears are in danger of extinction.

北极熊有绝种的危险。

We have polar bears and a real iceberg too!

我们有北极熊，还有真正的冰山！

Underneath this fur polar bears have black skin.

这层毛皮下，皮肤是黑色的。

This keeps the polar bear warm.

让北极熊保持温暖。

She's going to be researching polar bears.

她将研究北极熊。

Check out the sledding polar bear paper.

看看这些滑雪橇的北极熊包装纸。

Polar bears are the largest land carnivore.

北极熊是最大的陆地食肉动物。

So take polar bears, for instance.

以北极熊为例。

Once it forms, the polar bears walk onto it.

一旦结冰，北极熊就会冰层上走。

And the polar bears help the people of Churchill.

北极熊也帮助了丘吉尔镇的居民。

Polar bears spend a lot of time hunting seals.

北极熊花许多时间猎捕海豹。

But it cannot warn of approaching polar bears.

但对于正接近的北极熊它无法发出警告。

While the polar bear struggles, the walruses relax on the beach.

北极熊这边挣扎海象则沙滩上休息。