| 例句 |
Polar bears live in the Arctic.北极熊生活在北极地区。The polar bears at the zoo live in a controlled environment.动物园的北极熊生活在人工控制的环境中。In spite of vigilance a polar bear escaped from the zoo.尽管警戒很严，北极熊还是逃出了动物园。Polar bears are found in the Northern Hemisphere.北极熊生活在北半球。Due to the melting of the glaciers, the biosphere for polar bears underwent a great change.由于冰山的融解，北极熊的生物圈也遭到摧毁。We saw a baby polar bear at the zoo.我们在动物园看到一只北极熊幼崽。Polar bears stalk seals that are resting on the ice.北极熊悄悄地逼近在冰上休息着的海豹。 |