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

苔原被从牢笼中解放出来。

The North Pole, however, is an inhospitable frozen tundra that's incredibly difficult to get to.

然而北极却是一片不易到达又不易居住冻苔原。

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

因为苔原经常刮风，这会导致深处水流包围灌木丛。

" 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。

The birch is racing over the tundra faster than the pines can keep up.

桦树在苔原上生长速度比松树速度快。

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

灌木丛会停止生长并回苔原吗？

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

这就意味着要开着四轮车直奔苔原。

Many end up at airports, whose wide concrete spaces resemble the Arctic Tundra.

许多动物最后都去了机场，那里宽阔混凝土空间就像北极苔原一样。

As far as the eye could see the tundra of the plateau was flecked with black streaks.

在目光所及之处，高原苔原上布满了黑色条纹。

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

春天里，数以亿计鸟类像往年一样踏上了前往北极苔原旅程。

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影响呢？是北极苔原还是亚马逊热带雨林呢？

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啮齿类动物来说，没有比北极苔原更舒适地方了。

The musk oxen are one of the tundra's hardiest animals. But one mammal has mastered the tundra like no other.

麝牛是苔原上最顽强动物之一，但另一种哺乳动物却以不同寻常方式征服了苔原。

They report today that a white-spruce population has migrated surprisingly far north into the Arctic tundra.

他们今天报告说，令人出乎意料，一批白云杉向北迁移到了北极苔原。

" 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。

Over three million wild reindeer migrate across the tundra.

超过三百万头野生驯鹿加入到穿越苔原迁徙之旅。

She remembers the tundra with fewer trees when she was a child.

她记得小时苔原上树木较少。

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

有又厚又蓬松毛皮帮助对抗极端气，它们在苔原上生活得自由自在。

" 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。"

Their plumage changes little with the seasons and their nests are easy to spot against the exposed tundra soil.

它们羽毛几乎不随季节而，而它们巢穴在苔原上裸露泥土映衬下极易被识别。