Two polar bears的意思|示意

Pictured here: Two polar bears spar, or play fight, in Churchill, Manitoba.

图为两只北极熊在争吵或打闹，摄于马尼托巴丘吉尔。

Two polar bears play in front of Kaktovik's old defence early warning site used during the cold war.

两个北极熊在卡克托维克一所冷战时期使用的预警防御建筑前玩耍。

A 2007 study by the U.S. Geological Survey found that two-thirds of the polar bears on the planet could disappear by mid-century if Arctic ice keeps melting.

美国地质调查局2007年进行的一项研究发现：如果北极地区的冰层持续融化，那么地球上三分之二的北极熊在本世纪中叶前就可能消失。

Polar bears nurse their cubs for two and a half years with milk containing 35 percent fat-a security blanket for the upcoming Arctic winter.

北极熊的幼兽需要照顾两年半用奶汁含有35%的脂肪，达到一个安全的保暖覆盖即将到来的北极冬天。

Two polar bears SPAR in the snow as a magenta sunset descends over Churchill, Manitoba, Canada.

品红色的暮光降临到加拿大曼尼·托巴省的丘吉尔小镇，两只北极熊正在雪中打闹。

Two layers of fur and thick fat act as superb insulation, helping polar bears retain virtually all their body heat.

两层毛皮和肥厚的脂肪具有绝佳的隔热效果，可帮助北极熊保留几乎全部的体热。