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对于所有动物来说,和人类一样,睡眠也是必不可少的大事。也许人们对动物的睡眠不甚了解。其实,动物睡觉都会根据自身条件和自然环境,呈现出多姿多彩的睡姿。北极熊是世界上最大的陆地食肉动物,又名白熊。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。北极熊奔跑时最快时速可达60公里,是世界百米冠军的1.5倍。与棕熊和黑熊不同,北极熊并不冬眠,而是和人类一样睡觉。它们一觉能睡上7~8个小时。它们拥有厚厚的皮下脂肪,用以
As with all humans, sleep is an essential event for all animals. Maybe people do not understand the animal’s sleep well. In fact, animals will sleep according to their own conditions and the natural environment, showing a colorful sleeping position. Polar bears are the largest land carnivores in the world, also known as white bears. Polar bears have the same eyesight and hearing as humans, but their sense of smell is extremely sensitive, seven times more than canines. Polar bears fastest fastest speed of up to 60 km, is the world’s hundred meters champion 1.5 times. Unlike brown bears and black bears, polar bears do not hibernate, but sleep like humans. They can sleep for 7 to 8 hours. They have thick subcutaneous fat to use