中国经济制度ppt:A bird (英汉读物)

来源:百度文库 编辑:中财网 时间:2024/04/27 08:36:03
    
 A bird is an animal with a backbone, wings and feathers. All birds have wings, and most birds can fly. The wings have light, hollow bones that help birds fly. All birds also have feathers. Feathers help birds to fly. They also keep birds warm and dry.

Not all birds can fly. Penguins can’t fly but they are good at swimming. Emus can’t fly but they can run very quickly. All birds lay eggs. Most birds build nests for their eggs. The eggs need to be kept warm until they hatch. Some birds feed and care for their baby birds, or chicks, as they grow.

鸟类是一种有着翅膀和羽毛的脊椎动物。所有的鸟都有翅膀,并且大部分鸟类会飞。所有的鸟类也都有羽毛。羽毛可以帮助鸟类飞行,也可以保持它们的体温和干爽。

并不是所有的鸟类都会飞。企鹅就不能够飞但是它们十分善于游泳。鸸鹋也不会飞但是它们跑得很快。所有的鸟类都会下蛋。大部分的鸟会建窝来下蛋。它们的蛋需要一直保持温暖直到它们孵化出来。一些鸟会哺育照顾它们的小鸟成长。