polar bears

Which, for the great majority of the time that polar bears have been polar bears, has been a reasonable assumption.

绝大多数时候北极熊就是这个样子的，这看起来是一个合理的假设。

'It's always exciting to see polar bears in nature. I will never tire of it as they are fascinating creatures. It is always special. '

在自然的环境里看到北极熊是令人兴奋地。我永远不会厌倦他们，他们太有趣也太特别了。

The truth was that polar bears are ferocious wild animals and can become desperate for food in the ice-free summer months.

事实上北极熊是凶猛的野生动物，在无冰的夏季，北极熊会因难以觅食而变得饥不择食。

Similar footprint-recognition software has been used to create biometric signatures for white rhinos, polar bears, and cheetahs as well.

类似的足迹识别软件已经被用于为白犀牛、北极熊以及印度豹制作生物签名。

But a better option might be to phase animals like polar bears out of zoos, and focus instead on those animals that do well in captivity.

不过最好的选择就是对于特定的动物比如说北极熊，就让它走出动物园，用本来就擅长的关注行为代替囚禁。

For a long time the US government refused to see a link between climate change and threat to polar bears.

长期以来，美国政府拒绝将气候变化与对北极熊的威胁联系起来。

As the researchers pointed out, because polar bears live primarily on sea ice, their remains often end up in the ocean.

如同研究人员指出的，由于北极熊都生活在海冰上，它们的尸体最终留在了海洋中。

Scientists acknowledge the urgency to assess fireflies may not match that of polar bears or Siberian tigers.

同时，科学家们也承认对萤火虫评估的迫切性远没有对北极熊和西伯利亚虎那么强。

In fact, they have gone just about as wild as it is possible to get, examining polar bears on the Arctic archipelago of Svalbard.

他们竭其所能深入荒野，在北极区的斯瓦尔巴群岛采集与检验北极熊身上的样本。

Software Description: About Bear Up To Nature, Changing pictures of bears: brown and black bears, koala bears, panda bears, and polar bears.

狗熊的图片：褐色和黑色的狗熊，树袋熊生，熊猫，和北极熊。

New pictures show that polar bears are beginning to cannibalise each other as global warming destroys its hunting grounds.

最近拍摄到的照片显示，由于全球变暖导致猎食地消失，北极熊开始捕食同类。

But adding polar bears to the nation's list of endangered species, as some are now proposing, should not be part of those efforts.

但是像现在有些人提出的那样，把北极熊加到国家濒危物种名单中是不应该的。

If you want to see polar bears up close, the place to go isChurchill, Man. , on the western shore of Hudson Bay.

如果有人想要在近距离内观察一下北极熊的话，绝对应该到加拿大曼尼托巴省丘吉尔地区的哈得逊湾西岸。

Tragedy occurs, and the "Knut" living with his mother and two other female polar bears were not there.

悲剧发生时，和“克努特”生活在一起的母亲以及另外两头雌性北极熊都不在场。

Polar bears, desert gazelles and sharks were all added to the list of species facing extinction.

北极熊、沙漠瞪羚和鲨鱼都已经被列入濒临灭绝的物种。

The island itself is kind of like a Scandinavian Wild West. Reindeer exist in abundance, and polar bears are a genuine threat.

小岛有点像斯堪的纳维亚粗狂的西部，生活着许多驯鹿而他们的唯一的危险就是北极熊。

It's all too common these days to see pictures of polar bears trapped on rapidly diminishing ice sheets.

现在我们经常看见北极熊被困在迅速消失的薄冰上。

Biologists told me they saw eight dead polar bears floating in the water when they flew over the sea in a helicopter.

生物学家坐着直升机看到八个死亡的北极熊浮在水面上。

Mercury and other metals turn up in tuna, orange roughy, seals, polar bears and other long-lived animals.

在吞拿鱼、罗非鱼、海豹、北极熊及其他长寿动物的体内，科学家检测出了水银和其他金属。

Well this, um. . . especially attractive to polar bears in terms of conservation. And this er. . . well, may say umbrella species.

嗯，这，对保护北极熊是非常有意义的，嗯，它们也可以说是伞护物种。