1·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。
2·It's the race for Arctic oil.
这就是北极圈石油之争。
3·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。
4·"So global warming could produce more air pollution in the arctic," she said.
“因此，可以说全球变暖加重了北极圈的空气污染。”她说道。
5·More pleasingly still, the first images it sent back could have come out of a geography textbook's chapter on arctic terrain.
更加高兴的是，在其发回的第一个图片中的影像仿佛就像是来自地理书中北极圈图片一样。
1·A link between summer sea ice in the Arctic and winter temperatures in the northern hemisphere was first proposed in 1914.
北极区夏季的海上浮冰和北半球冬天的气温之间的联系最早在1914年被提出。
2·High in the Canadian Arctic is a glacier-carved valley that is like none other on Earth.
高纬度的加拿大北极区是一个冰川覆盖的山谷，是地球上一个与众不同的地方。
3·First-time moviemaker Zac Kunuk filmed it in the Canadian Arctic.
导演让克·库努克第一次担任导演，影片在加拿大的北极区拍摄。