The loss of Arctic sea ice due to global warming is widely recognised as the greatest threat to the polar bears' survival.

大家普遍认为全球变暖导致的北极冰雪融化是北极熊生存的最大威胁。

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Scientists fear that the shifting Arctic climate could threaten the species' survival.

科学家们担心，北极气候的不断变化可能会威胁物种的生存。

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The Arctic is populated with people of different nationalities. The Antarctic, in contrast, has no permanent residents because the climate there is unfavourable to human survival.

北极居住着各族人民。 与北极显然不同的是， 南极却没有永久性的居民， 因为那里的气候不利于人类生存。

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With bright eyes and an engaging smile, he says songs and stories were vital to survival when his family lived in igloos above the Arctic Circle.

VOA: standard.2010.02.19

The folder on my computer where I store these factoids contains scores of categories, from Arctic Survival to Zoos.

WSJ: Jeffery Deaver on Bathrooms Around the World | Traveler's Tale

At a time when discrimination against aboriginal peoples was common, Amundsen was a devoted student of the lessons of the Netsilik Eskimos, who lived in the Canadian arctic, and with whom Amundsen had spent substantial time studying their diets, their clothes, and their survival skills, while on the first successful expedition to discover and traverse the Northwest Passage.

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