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英语翻译北极熊的视力和听力与人类相当,但它们的嗅觉极为灵敏,是犬类的7倍.它们主要捕食海豹,特别是环斑海豹,此外也会捕食

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英语翻译
北极熊的视力和听力与人类相当,但它们的嗅觉极为灵敏,是犬类的7倍.它们主要捕食海豹,特别是环斑海豹,此外也会捕食髯海豹、鞍纹海豹、冠海豹.除此之外,它们也捕捉海象、白鲸、海鸟、鱼类、小型哺乳动物,有时也会打扫腐肉.目前生活在世界上的北极熊大约有2万多只
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Polar bears and human vision and hearing quite,but they are extremely sensitive sense of smell,dogs are the 7 times.Their main predator of seals,especially ringed seals,bearded seals also will prey,saddle pattern seals,crown seals.In addition,they also capture the walrus,beluga whales,seabirds,fish,small mammals,carrion,occasional cleaning.Currently living in the polar bear around the world there is only more than 20,000