One day, a boy found an eagle's (鹰) egg and put it in the nest (窝) of a prairie (草原) chicken. The eagle hatched (孵化) and thought he was a chicken. He grew up doing what prairie chickens do. It was a boring life.

   Day after day, the eagle grew older. One day, he and his prairie chicken friend saw a beautiful bird soaring (翱翔) in the sky, high above the mountains. "Oh, I wish I could fly like that!" said the eagle. The chicken replied, "Don't give it another thought. That's the strong eagle, and it's the king of all birds. You could never be like him because you are a chicken!" And the eagle never thought about that. He went on living like a chicken. Even when he died, he thought he was a prairie chicken.

   My friend, you too are a small eagle. So try your best to fly upon (在...之上) the sky, and don't listen to the prairie chickens!