He must have fallen off somewhere out on the tundra.

他肯定是在冰原的某个地方摔下来了。

And her hands were like two frozen chunks of tundra.

她的手就像冻原上的两个冰块。

So, if you're planning on exploring the frigid tundra Hoth-style, it might be helpful.

所以，如果你计划像在霍斯一的冻原探险，它可能会有所帮助。

" Let us gather tundra grass and thatch the roof, " Maud said.

" 我们还是去弄苔原草苫屋顶吧。" 茅德说。

Beavers may be following the northward expansion of vegetation onto the tundra.

海狸可能是在追随冻原植被向北扩展的脚步。

The tundra is released from its prison of snow and ice.

苔原被从冰雪的牢笼中解放出来。

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，灰狼必须远距离活动才能够生存。

But which places—Arctic tundra or Amazon rainforest—are most vulnerable to such climate change?

但是那些地方更容易受到气候变化影响呢？是北极苔原还是亚马逊热带雨林呢？

That means heading straight into the tundra on a four-wheeler.

这就意味要轮车直奔苔原。

For lemmings, small fussy rodents, there is no place more comfortable than the Arctic tundra.

对于旅鼠这种小而挑剔的啮齿类动物来说，没有比北极苔原更舒适的地方了。

They have witnessed an increase in the growth of shrubs in the tundra of arctic Alaska.

他们目睹了北极阿拉斯加的苔原上灌木生长的增加。

As the tundra is very windy, this causes deep drifts to surround the shrubs.

因为苔原经常刮风，这会导致深处的水流包围灌木丛。

" Let's go back, " I said dejectedly. " I think tundra grass, will do, after all" .

" 咱们回去吧，" 我沮丧地说，" 我觉得归根到底苔原草也可以用。"

But they're about to begin an epic journey north through the bleak and forbidding tundra.

但它们即将始一场史诗之旅，向北穿越荒凉而的苔原禁地。

Protected from the extreme climate by their thick shaggy coats, they're at home on the tundra.

有又厚又蓬松的毛皮帮助对抗极端气候，它们在苔原上生活得自由自在。

Arctic hare is a mainstay of the tundra diet and one the cubs seem particularly keen on.

北极兔是冻原主要的食物小家伙们貌似对这一食物情有独钟。

" I think the tundra grass will make just as good a roof, " she said.

" 我觉得就用苔原草苫屋顶也行。" 她说。

Won't the shrub stop and it'll turn back into tundra?

灌木丛会停止生长并变回苔原吗？

But the journey made by the wild reindeer with the North American tundra is on the different scale.

然而北美洲苔原上生驯鹿群的迁徙之旅规模上却是截然不同的。

In spring, hundreds of millions of birds make the annual trip to the arctic tundra.

春天里，数以亿计的鸟类像往年一踏上了前往北极苔原的旅程。