第1811期:Penguins lost ability to taste fish

With their waddling gait and lack of flight, penguins have long been an oddity in the bird kingdom. Now zoologists have discovered they're unusual too in their sense of taste.由于走路摇摇晃晃、不会飞，企鹅长期以来一直是鸟类王国中的异类。 现在，动物学家发现它们的味觉也很不寻常。Most birds can't detect sweet things. But penguins have also lost the taste for bitter and umami, or meaty flavours. Scientists think fish would taste of little but salt to a penguin. And because they swallow fish whole they may not be able to discern flavours at all.大多数鸟类无法检测到甜食。 但是企鹅也失去了对苦味和鲜味或肉味的味觉。 科学家们认为，对于企鹅来说，鱼的味道只有咸味。 而且因为他们会吞下整条鱼，所以他们可能根本无法辨别味道。They say the puzzle could be explained by the penguins' evolution in the extreme cold of Antarctica.他们说这个谜题可以用企鹅在南极洲极寒环境中的进化来解释。词汇表waddling (身体)摇摇摆摆的gait 步态lack 缺少flight 飞翔的能力oddity 奇特（现象）bird kingdom 鸟王国zoologists 动物学家detect 尝到bitter 苦味umami 鲜味meaty 肉味whole 整个的，（指整条鱼被吞下）discern 辨别puzzle 谜，难题evolution 进化extreme 极端的