名詞 polar bear:

1. white bear of arctic regions
   同義詞：ice bear, Ursus Maritimus, Thalarctos maritimus

1. Although they can swim, the polar bears are terrestrial animals.
   北極熊雖然會(huì)游泳，但也是陸棲動(dòng)物。
2. In spite of vigilance a polar bear escape from the zoo.
   盡管警戒很嚴(yán)，北極熊還是逃出了動(dòng)物園。