polar bear

名词 polar bear:

1. white bear of arctic regions
   同义词：ice bear, Ursus Maritimus, Thalarctos maritimus

1. Although they can swim, the polar bears are terrestrial animals.
   北极熊虽然会游泳，但也是陆栖动物。
2. In spite of vigilance a polar bear escape from the zoo.
   尽管警戒很严，北极熊还是逃出了动物园。