The Pole Star appears to be changing from a star that pulsates.
北极星似乎由一颗脉动的恒星衍变而来。
Brittleness remains a problem when building steel structures in cold conditions, such as oil rigs in the Arctic.
对于在寒冷条件下建造钢结构，比如北极的石油钻井平台，如何解决材料的脆性仍然是一个问题。
A hunter who took what appeared to be a baby polar bear from the North Pole has been found and will face strict punishment.
一个猎人从北极捕获了一只疑似北极熊幼崽的动物，目前已被发现，他将面临严厉的惩罚。
While a polar bear is sleeping on an ice berg with its paws clutched around, it is like a toddler holding their teddy bear. That is truly cute!
当北极熊抱着爪子睡在冰山上时，它就像一个蹒跚学步的孩子抱着他们的泰迪熊。那真的很可爱！
Helen had a dream to walk to the North Pole alone when she was forty.
海伦四十岁的时候有一个梦想：要独自走到北极。
The Canadian Arctic is a vast, treeless polar desert that's covered with snow for most of the year.
加拿大的北极是一个广阔的、没有树木的极地沙漠，一年中大部分时间都被雪覆盖着。
Some 10,000 pairs of the birds, called fulmars, a kind of Arctic seabird, make their nests on Devon Island, north of the Arctic Circle.
在北极圈以北的德文岛上大约有一万对鸟在那里筑巢，它们被称为管鼻鹱，是一种北极海鸟。
This is troubling as climbing arctic temperatures combined with rapid sea ice loss are creating a new type of climate feedback loop which could accelerate Arctic warming.
这是令人担忧的，因为北极气温上升和海冰迅速消失正在形成一种新型的气候反馈回路，可能会加速北极变暖。
Shubin distinguished himself by leading an expedition to the Arctic, which uncovered the remains of a fish with a wrist-a creature with part fin and limb.
舒宾的杰出成就是带领了一次北极探险。在这次探险中，他们发现了一种半鳍半肢的动物——一条有腕的鱼化石。
The Arctic is a good place for this data.
北极是个接收此类数据的好地方。
Food onshore is very limited and there is simply nothing comparable to a seal that provides a polar bear with fat and energy.
陆上食物是非常有限的，根本没有什么能与一只海豹所能给北极熊提供脂肪和能量相比。
The shaft of the ceremonial mace is the whorled tusk of a narwhal, a small Arctic whale. The door handles are of walrus tusk.
仪式权杖柄是用一种小型的北极独角鲸的牙齿制成的。门柄是用海象的牙齿制成的。
Global warming has posed a serious threat to the survival of animals such as polar bears.
全球变暖对北极熊等动物的生存造成了严重威胁。
But in some waters, such as those of the Arctic, a warming will make conditions worse for phytoplankton.
但在某些水域，如北极水域，气候变暖将使浮游植物的生存条件变得更加恶劣。
Nunavut is 1.9 million square kilometres of rock and ice, and a handful of islands around the North Pole.
努纳武特地区包括190万平方公里被岩石和冰雪覆盖的陆地，以及北极附近的几个岛屿。
The Arctic sea ice holds a central position in the Earth's climate system and it's deteriorating faster than expected.
北极海冰在地球气候系统中占据中心位置，并且它恶化的速度比预期的更快。
Last week the scientists warned that a third of the world's polar bears could disappear in the next 40 years.
上周，科学家们警告说，世界上三分之一的北极熊可能会在未来40年里消失。
Since boyhood, Shirase had dreamed of becoming a polar explorer like Amundsen, and he initially set his sights on the North Pole.
从孩提时代起，Shirase 就梦想成为像阿蒙森一样的极地探险家，而他最初的目标是去北极。
He has argued that tapping ANWR's oil would help ease California's electricity crisis and provide a major boost to the country's energy independence.
他认为，开采北极国家野生动物保护区的石油将有助于缓解加州的电力危机，并为国家的能源独立提供重大推动力。
With so much at stake, the Inuit are determined to play a key role in teasing out the mysteries of climate change in the Arctic.
面临如此多的危险，因纽特人决心在揭开北极气候变化之谜方面发挥关键作用。
Overall, Earth is warming at a rapid pace—2014 through 2017 rank as the hottest years on record—and the Arctic is warming twice as fast as anyplace else on Earth.
总的来说，地球正在快速变暖——2014年到2017年是有记录以来最热的年份，北极的变暖速度是地球上其他地方的两倍。
In ''On Thin Ice'', Richard Ellis, a writer and illustrator, paints a natural history of the icon of the north, the polar bear.
在《薄冰之上》一书中，作家兼插画家理查·埃利斯描绘了北极图标，北极熊的自然史。
Scientists fly in a helicopter, over the places where polar bears live.
科学家们乘坐直升飞机，飞过北极熊的栖息地上空。
According to a study in Nature Climate Change, the number of most polar bears will fall rapidly by 2080.
据《自然气候变化》的一项研究显示，到2080年，几乎大多数北极熊的数量都将急剧减少。
Around a thousand years ago, one group emerged that was uniquely well adapted to cope with the Arctic environment.
大约一千年前，一个对北极环境有独特适应力的群体出现了。
An arctic tern, on its 20,000 km flight from the extreme south of South America to the Arctic circle, will take no notice of a nice smelly herring offered from a bird-watcher's boat along the way.
北极燕鸥在从南美洲的最南端飞往北极圈的路线全长2万公里，但燕鸥这一路上都不会留意观鸟船送来的散发臭味却又可口的鲱鱼。
It is difficult to figure out a global population of polar bears as much of the range has been poorly studied.
由于大部分有关其生活范围的研究还很少，所以很难统计出全球北极能的数量。
In recent years some Inuit people in Nunavut have reported increases in bear sightings around human settlements, leading to a belief that populations are increasing.
近年来，努纳武特的一些因纽特人报告说，在人类居住区周围看到北极熊的情况有所增加，这使人们认为其数量在增加。
Modern methods for tracking polar bear populations have been employed only since the mid-1980s, and are expensive to perform consistently over a large area.
跟踪北极能种群的现代方法仅在20世纪80年代中期才被采用，而且，要在大范围内连续采用这种方法，其代价非常高昂。
He knew that the sources of the red-stained grains were generally closer to the North Pole than were the places yielding a high proportion of "clean" grains.
他知道，这些红色颗粒的来源通常更靠近北极，而不是那些产生大量“干净”颗粒的地方。
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