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- 我从未见过北极熊。
I have never seen an arctic bear.
- 北极熊的栖息地是冰冷的北极海域。
The polar bear's habitat is the icy waters of the Arctic.
- 尽管警戒很严，北极熊还是逃出了动物园。
In spite of vigilance a polar bear escape from the zoo.
- 北极熊虽然会游泳，但也是陆栖动物。
Although they can swim, the polar bears are terrestrial animals.
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