英文.... | Members of a species of large, solitary, strictly carnivorous bear found throughout the Arctic region, having a stocky build, long neck, relatively small head, short rounded ears, a short tail, insulating blubber, black skin, and fur comprising dense underfur with an outer layer of guard hairs that appear white or biege but are actually transparent. The polar bear travels long distances over vast desolate expanses, generally on drifting oceanic ice floes, searching for seals, its primary prey. It is endangered by loss of habitat resulting from global warming. According to both fossil and genetic evidence, the polar bear diverged from the arctic brown bear around 200,000 years ago, when it is probable that a population of brown bears became isolated during a period of glaciation in the Pleistocene. |
北極熊(種)............ | [AS-Academia Sinica] |
................. | 朗文當代大辭典 126 |
................. | 國家教育研究院-雙語詞彙、學術名詞暨辭書資訊網 August 26, 2011 |
................. | 智慧藏百科全書網 August 26, 2011 |
................. | 大英百科全書線上繁體中文版 August 26, 2011 |
白熊............ | [AS-Academia Sinica] |
................. | 智慧藏百科全書網 August 26, 2011 |
................. | 大英百科全書線上繁體中文版 August 26, 2011 |
水熊............ | [AS-Academia Sinica] |
................. | 大英百科全書線上繁體中文版 August 26, 2011 |
海熊............ | [AS-Academia Sinica] |
................. | 大英百科全書線上繁體中文版 August 26, 2011 |
冰熊............ | [AS-Academia Sinica] |
................. | 大英百科全書線上繁體中文版 August 26, 2011 |
Ursus maritimus(species)............ | [VP] |
................. | Webster's Third New International Dictionary (1961) |
................. | Animal Diversity Web (1995-) accessed 15 May 2007 |
................. | Natural History Museum, London (2000-) accessed 20 August 2008 |
................. | National Museum of Natural History, Mammal Species (2000-) accessed 20 August 2008 |
................. | Encyclopedia Britannica Online (2002-) accessed 15 May 2007 |
polar bears............ | [VP] |
................. | Oxford English Dictionary Online (2002-) |
................. | Encyclopedia Britannica Online (2002-) |
polar bear............ | [VP] |
................. | Encyclopedia Britannica Online (2002-) |
white bears............ | [VP] |
................. | Encyclopedia Britannica Online (2002-) |
ice bears............ | [VP] |
................. | Encyclopedia Britannica Online (2002-) |
sea bears............ | [VP] |
................. | Encyclopedia Britannica Online (2002-) |
Subject:............ | [VP] |
................. | Webster's Third New International Dictionary (1986) |
................. | Animal Diversity Web (1995-) accessed 15 May 2007 |
................. | Encyclopedia Britannica Online (2002-) accessed 15 May 2007 |