企鹅的腿，其实特别长？

Penguins look short-legged. 企鹅看着，腿短短的。 But under the feathers, their knees are hidden. 可羽毛下面，藏着它们的膝盖。 Their thighs lie flat under the body. 它们的大腿，是横在肚子底下的。 Underneath, their legs are not short at all. 扒开羽毛，腿一点也不短。 Short legs help them swim fast. 短腿在水里，反而游得快。 They are birds that swim instead of fly. 它们是只会游泳、不会飞的鸟。