育才学习网1.一篇关于北极熊的英文介绍
北极熊又称白熊，是在北极里生长的熊，它是陆上最庞大的肉食动物。在它生存的空间里，它是食物链最顶层。它拥有极厚的脂肪及毛发来保暖，其白色的外表在雪白的雪地上是良好的保护色，而且它可以在陆上及海上捕捉食物，因此它能在北极这种极严酷的气候里生存.
Polar bears, is also called arctic bear in the arctic grows, it is the largest predator on land. In its existent space, it is the topmost food chain. It has thick fat and hair to stay warm, its white appearance on white snow is good protective coloration, and it can on land and sea, so it can catch food in the arctic this extremely harsh climate survive.
2.给一段描述北极熊的英文
The polar bear is a bear native to the Arctic. Polar bears and Kodiak bears are the world's largest land carnivores, with most adult males weighing 300-600 kg ; adult females are about half the size of males. Its fur is hollow and translucent, but usually appears as white or cream colored, thus providing the animal with effective camouflage. Its skin is actually black in color. Its thick blubber and fur insulate it against the cold. The bear has a short tail and small ears that help reduce heat loss, as well as a relatively small head and long, tapered body to streamline it for swimming. A semi-aquatic marine mammal, the polar bear has adapted for life on a combination of land, sea, and ice, and is the apex predator within its range. It feeds mainly on seals, young walruses, and whales, although it will eat anything it can kill. It is the bear species most likely to prey on humans. The polar bear is a vulnerable species at high risk of extinction. Scientists and climatologists believe that the projected decreases in the polar sea ice due to global warming will reduce their population by two thirds by mid-century. Local long-term studies show that 7 out of 19 subpopulations are declining or already severely reduced. In the USA, the Center for Biological Diversity petitioned to up-list the legal conservation status of polar bears to threatened species in 2005. This petition is still under review.。
3.用英文介绍北极熊
The polar bear (Ursus maritimus) is a bear native to the Arctic Ocean and its surrounding seas. The world's largest predator found on land, an adult male weighs around 400–680 kg (880–1,500 lb), 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. As it can hunt consistently only from sea ice, the polar bear spends much of the year on the frozen sea, although most polar bears are born on land.
The polar bear is classified as a vulnerable species. Of the 19 recognized polar bear subpopulations, 5 are declining, 5 are stable, 2 are increasing, and 7 have insufficient data. For decades, unrestricted hunting raised international concern for the future of the species; populations have rebounded after controls and quotas began to take effect. For thousands of years, the polar bear has been a key figure in the material, spiritual, and cultural life of Arctic indigenous peoples, and the hunting of polar bears remains important in their cultures.
The IUCN now lists global warming as the most significant threat to the polar bear, primarily because the melting of its sea ice habitat reduces its ability to find sufficient food. Sea ice melting will also cause changes in their mating, and traveling patterns. The IUCN states, "If climatic trends continue polar bears may become extirpated from most of their range within 100 years." On May 14, 2008, the United States Department of the Interior listed the polar bear as a threatened species under the Endangered Species Act.
4.怎样用英语介绍北极熊
Polar Bears and Conservation Page 1 of 3 Click image to enlarge. Polar Bear Status Report Polar 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.。
5.英文的介绍北极熊英文
The polar bear (Ursus maritimus) is a bear native largely within the Arctic circle encompassing the Arctic Ocean, its surrounding seas and surrounding land masses. It is the world's largest carnivore species found on land. It is also the largest bear, together with the omnivore Kodiak bear which is approximately the same size.[3] An adult male weighs around 350–680 kg (770–1,500 lb),[4] 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.[5] Although most polar bears are born on land, it spends most of its time at sea, hence its name meaning "maritime bear", and can hunt consistently only from sea ice, spending much of the year on the frozen sea。
6.谁能帮我写一篇关于介绍北极熊的文章（英文的）200字左右
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。
7.用英语写出北极熊的一些资料
Polar bears live in the Arctic. They do not stay in one place. They travel across the snow and pack ice looking for food. Sometimes they swim far out to sea. Polar bears are the largest bears in the world. Adults weigh 650 to 1100 pounds (295 kg to 498 kg ) Males are larger than females. A polar bear's coat can be from white to yellowish in color.When the bears come ashore in the summer they eat plants and berries. In late summer and early autumm the bears go along the coastline looking for dead whales and dead walruses. They also eat lemmings, arctic foxes and birds.Their favorite food is the ringed seal. The polar bear waits by the seal's breathing holes in the ice and quickly snatches the seal when it pokes its head out of the hole. Polar bears are able to swim in the icy Arctic Ocean without freezing. They have thick oily fur coats and a layer of fat under their skin. When bears comes out of the water they shake the water off their coats. The bear's large feet are like snowshoes. The hair on the soles of its feet help the bear walk on the slippery ice and snow. The bear walks with toes pointing inward to avoid slipping. Polar bears are good swimmers. They paddle with their front legs and use their hind legs as rudders. The polar bear has a very good sense of smell and can sniff dead animals from far away and can find seals in dens beneath the snow.The polar bear's huge teeth are for tearing the prey apart. The polar bear is so strong it can kill an animal with one blow to the head.The female ususally has two cubs. Sometimes she may have three. When the cubs are born they are very tiny. They weigh less than less than a kilogram (less than two pounds). The cubs are hairless, blind and deaf. The mother can hide them in between the toes of her front paws. In November or December the cubs are born in dens in the snow. They stay in the den for about three months. The cubs are safe and protected from the cold and the wind. The mother feeds them milk but she has nothing to eat. The mother and her cubs leave the den in March or April. The cubs stay with their mother for about two years. In one year the cubs are as big as a person. A female polar bear gives birth every third year. Sometimes polar bears go into towns and villages. They can break into buildings to find food. Polar bears are found near the town of Churchill ( Canada ). They search for food at the garbage dump outside of town. Sometimes they go right into the town. Bears that raid towns are not shot, but caught and taken back to the wild. The polar bear eats the seal's skin, fat and internal organs but not the meat. Most northern countries have laws to protect the polar bear. Hunters are still able to kill a few each year.。