小学英语问答:Flying birds

题目

小学英语问答:Flying birds
Birds don’t fly high up in the sky.The air is too thin.It is hard for birds to breathe in thin air .Thin air doesn 't hold them up.
Birds fly near the ground so that they can see where they are.The birds look for places they know.Then they do not get lost .Some birds fly so low over the ocean that the waves often hide them.Many birds fly long distances距离 in the spring and autumn.

答案

天空中的鸟儿也飞不高了.空气太薄.很难对鸟类的呼吸在空气稀薄的空气稀薄.不起来.
鸟儿飞近地面,他们可以看到他们在哪里.鸟儿找地方他们知道.他们不会迷路了.有些鸟飞得很低,在海洋,海浪经常把他们.很多鸟类飞很长的距离距离在春天和秋天.