文档介绍：Sound on The eagle has the longest life-span of its ’ species 老鹰是世界上寿命最长的鸟类。 It can live up to 70 years But to reach this age, the eagle must make a hard decision. 它一生的年龄可达 70 岁, 但要活那么长的寿命, 它必须做出困难却重要的决定。 Its ’ long and flexible talons can no longer grab prey which serves as food 当老鹰活到 40 岁时,它长而灵活的爪子开始老化,无法有效地抓住猎物。 In In its its ’’ 40 40 ’’s s Its ’ long and sharp beak es bent 它长而锐利的啄变得弯曲。 Its ’ old-aged and heavy wings, due to their thick feathers, e stuck to its ’ chest and make it difficult to fly. 它的翅膀变得十分沉重,因为它的羽毛长得又浓又厚,几乎刺到胸膛,使得飞翔十分吃力。 Then, the eagle is left with only two options: die or go through a painful process of change which lasts 150 days. 它只有两种选择:等死,或经过一个十分痛苦的更新过程—— 150 天漫长的操炼。 The process requires that the eagle fly to a mountain top and sit on its ’ nest. 它必须很努力地飞到山顶,在悬崖上筑巢。停留在那里。 There the eagle knocks its ’ beak against a rock until it plucks it out. 老鹰首先用它的喙击打岩石,直到完全脫落。 After plucking it out, the eagle will wait for a new beak After plucking it out, the eagle will wait for a new beak to grow back and then it will pluck out its to grow back and then it will pluck out its ’’ talons. talons. 等脱落后,老鹰静静地等候新的喙长出来。它会用新长出的喙把指甲一根一根的拔出來。