polar英文短文

The polar bear is a bear native to the Arctic Ocean and its surrounding seas. The world's largest carnivore found on land,an adult male weighs around 400–680 kg while an adult female is about half that size. Although it is closely related to the brown bear, it has evolved to occupy a narrow ecological niche, with many body characteristics adapted for cold temperatures, for moving across snow, ice, and open water, and for hunting the seals which make up most of its diet.北极熊是一种栖息在北冰洋和它附近地区的熊.是地面上最大的肉食动物.一头雄性的北极熊体重大约是400到680公斤,而雌性北极熊大约是雄性一半的体重.虽然北极熊和棕熊是近亲,但它的进化却朝向一个窄小的生态环境.它身体的大多特征都是适于寒冷环境的,利于在冰雪和海中行动,而且也有利与猎杀它们的主要食物--海豹

Polar Bears and ConservationPage 1 of 3 Click image to enlarge.Polar Bear Status ReportPolar bears are a potentially threatened (not endangered) species living in the circumpolar north. They are animals which know no boundaries. They pad across the ice from Russia to Alaska, from Canada to Greenland and onto Norway's Svalbard archipelago. No adequate census exists on which to base a worldwide population estimate, but biologists use a working figure of perhaps 22,000 to 25,000 bears with about sixty percent of those living in Canada.In most sections of the Arctic where estimates are available, polar bear populations are thought to be stable at present. Counts have been decreasing in Baffin Bay and the Davis Strait, where about 3,600 bears are thought to live, but are increasing in the Beaufort Sea, where there are around 3,000 bears.In the 1960s and 1970s, polar bears were under such severe survival pressure that a landmark international accord was reached, despite the tensions and suspicions of the Cold War. The International Agreement on the Conservation of Polar Bears was signed in Oslo, November 15, 1973 by the five nations with polar bear populations (Canada, Denmark which governed Greenland at that time, Norway, the U.S., and the former U.S.S.R.).The polar bear nations agreed to prohibit random, unregulated sport hunting of polar bears and to outlaw hunting the bears from aircraft and icebreakers as had been common practice. The agreement also obliges each nation to protect polar bear denning areas and migration patterns and to conduct research relating to the conservation and management of polar bears. Finally, the nations must share their polar bear research findings with each other. Member scientists of the Polar Bear Specialist Group meet every three to four years under the auspices of the IUCN World Conservation Union to coordinate their research on polar bears throughout the Arctic.With the agreement in force, polar bear populations slowly recovered. The Oslo agreement is one of the first and most successful international conservation measures enacted in the 21st century. 北极熊和保护页1 3 点击图像扩大。北极 熊情况报告北极熊是一个潜在地被威胁的(没危险的) 种类 居住在极地周围北部。他们是不知道界限的动物。他们填塞横跨冰 从俄国到阿拉斯加, 从加拿大到格陵兰和挪威的Svalbard 群岛。充 分人口调查不存在在哪些根据一个全世界人口估计, 而是生物学家 在加拿大使用或许22,000 头到25,000 头熊一个运作的图与大约百 分之六十那些生活。在估计是可得到的Arctic 的多数部分, 北极熊 群当前被认为是稳定。计数正在减少在Baffin 海湾和迪维斯海峡 , 大约3,600 头熊被认为居住, 只是增加在Beaufort 海, 有大约 3,000 头熊。在60 年代和70 年代, 北极熊是在这样的严厉生存压力下 地标国际协议被到达, 尽管冷战的紧张和怀疑。关于北极熊的保护 的国际协议被签署在奥斯陆, 1973 年11月15 日, 由五个国家与北 极熊群(加拿大, 治理格陵兰那时, 挪威, 美国,和前苏联) 的丹麦 。北极熊国家同意禁止北极熊任意, 无条理的体育狩猎和置 之法外狩猎熊从航空器和icebreakers 象有是惯例。这个协议并且 迫使各个国家保护北极熊denning 的区域和迁移样式和举办研究与 北极熊保护和管理相关。终于, 国家必须分享他们的北极熊研究研 究结果与彼此。北极熊专业人员小组的成员科学家见面每三到四年 在IUCN 世界保护联合的恩惠之下协调他们的对北极熊的研究遍及 Arctic 。与协议生效, 北极熊群慢慢恢复。奥斯陆协议是一的当中 一个和多数成功的国际保护措施立法在21 世纪。

The polar bear is the largest animal in the bear family, body length of up to 2.5 meters, 1.6 meters high, weighing 500 kg. Polar bearsare not only good at swimming in cold water, but also good at quick jump on the ice, the maximum can reach a height of 1.8 metres. As the "king of the Arctic Circle", except for humans, bears almost no natural enemies。希望采纳！北极熊是熊科动物中最大的，体长可达2.5米，高1.6米，重500公斤。北极熊不仅善于在冰冷的海水中游泳，还擅长在冰面上快速跳跃，最高可以达到1.8米的高度。作为“北极圈之王”，除去人类，北极熊几乎没有天敌

北极熊陷绝境：悲剧不仅是自相残杀 Polar bears straits:the tragedy is not only kill each other 饥肠辘辘的北极熊不得已同类相食.Starving polar bears turn to cannibalism.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.New pictures show that polar bears are beginning to cannibalise each other as global warming destroys its hunting grounds.北极熊通常在浮冰上抓捕海豹作为食物.但由于全球变暖,浮冰融化,在海上猎食也越来越困难,北极熊的捕猎场所也不得不转移到陆地上.Polarbears usually subsist on seals,which they hunt from a platform of seaice.But the melting of sea ice as a result of rising globaltemperatures has made it more difficult for polar bears to hunt sealsat sea,confining the bears to land.有更多的北极熊淹死在海里,因为它们被迫游向更远的海域去寻找食物.Drowning is also more common as bears are forced to swim further out to sea to find food.这些照片进一步证实了越来越多处于绝境之中的北极熊,为了生存,开始捕杀自己的同伴.科学家们称本年度内已经发生八起这样的事件.Theimages add to the evidence that polar bears are increasingly huntingeach other for food in their desperation to survive.Scientists say theyare aware of eight cases so far this year.美国地质调查局和世界自然保护联盟近日分析指出,在接下来的五十年内,由于全球变暖,极地浮冰融化,世界上仅存的20000到25000只北极熊还将减少三分之二.Recentanalysis by the US Geological Survey and World Conservation Union foundthat two-thirds of the 20,000 to 25,000 polar bears in the world couldbe lost in the next 50 years as warming temperatures melt the ice.失去浮冰栖息地,北极熊将无法长期生存下去.其他威胁,包括原油和天然气钻探、海运及有毒物质污染,与气候剧变和浮冰融化相比都不值一提.Withoutthe sea ice habitat,the polar bear will not survive in the long term.There are other threats,such as oil and gas drilling,shipping andtoxins,but th ey pale in comparison to climate change and the loss ofthe sea ice