一个美国老人告诉我,他的牧师讲的一个关于鹰的故事,让他在即将过93岁生日时重返学堂。那个故事是这样的:鹰是自然界最长寿的鸟,它们通常可以活到70岁。然而,在活到40岁的时候,鹰的爪子开始老化,无法有效地抓住猎物;它们的喙变得又长又弯,几乎碰到胸膛;它们的翅膀变得十分沉重,因为它们的羽毛长得又浓又厚,使得飞翔十分吃力。这时候,鹰必须面对两种 An American old man told me a story about his eagle told by his pastor that he should return to school soon after his 93rd birthday. That story is this: The eagles are the longest lived birds in the world, and they usually live to be seventy. However, when they were 40, the eagles' claws started to age and could not effectively hold their prey; their beaks became long and curving and almost touched the chest; their wings became very heavy because of their feathers Looks thick and thick, making it very difficult to fly. At this time, the eagle must face two kinds