small gods这里面的一段话的寓意是什么 最好能帮忙翻译一下

small gods这里面的一段话的寓意是什么 最好能帮忙翻译一下
Now consider the tortoise and the eagle.
The tortoise is a ground-living creature. It is impossible to live nearer the ground without being under it. Its horizons are a few inches away. It has about as good a turn of speed as you need to hunt down a lettuce. It has survived while the rest of evolution flowed past it by being, on the whole, no threat to anyone and too much trouble to eat.
And then there is the eagle. A creature of the air and high places, whose horizons go all the way to the edge of the world. Eyesight keen enough to spot the rustle of some small and squeaky creature half a mile away. All power, all control. Lightning death on wings. Talons and claws enough to make a meal of anything smaller than it is and at least take a hurried snack out of anything bigger.
And yet the eagle will sit for hours on the crag and survey the kingdoms of the world until it spots a distant movement and then it will focus, focus, focus on the small shell wobbling among the bushes down there on the desert. And it will leap . . .
And a minute later the tortoise finds the world dropping away from it. And it sees the world for the first time, no longer one inch from the ground but five hundred feet above it, and it thinks: what a great friend I have in the eagle.
And then the eagle lets go.
And almost always the tortoise plunges to its death. Everyone knows why the tortoise does this. Gravity is a habit that is hard to shake off. No one knows why the eagle does this. There's good eating on a tortoise but, considering the effort involved, there's much better eating on practically anything else. It's simply the delight of eagles to torment tortoises.
But of course, what the eagle does not realize is that it is participating in a very crude form of natural selection.
One day a tortoise will learn how to fly.
寓意,麻烦说一下
就是主题

现在想想乌龟和老鹰.
乌龟是一个地面生物.生活不可能接近地面不下.它的视野只有几英寸远.它有很好的加速你需要追捕一个生菜.它是在进化的休息流过它的被,总体上,没有威胁到任何人,吃太多的麻烦.
然后是鹰.的空气和高的地方一个生物的视野,一路走到世界的边缘.视力敏锐的足以发现一些小的和半英里远的沙沙声吱吱作响的生物.所有的力量,所有的控制.在雷击死亡的翅膀.爪爪足以让一顿任何小于它,至少需要一个匆匆的小吃的东西大.
然而,鹰会坐上几个小时在峭壁和调查世界的王国,直到点遥远的运动并将焦点,焦点,集中在小壳摆动的灌木丛在沙漠中.它会跳...
一分钟后,乌龟找到世界脱离它.它认为世界的第一次,不再一寸从地面但五百英尺以上,它想：真是一个伟大的朋友我的鹰.
然后鹰放开.
几乎总是乌龟使其死亡.每个人都知道为什么乌龟呢.重力是一种习惯,很难摆脱.没有人知道它为什么这样做.有良好的饮食对乌龟但是,考虑到所付出的努力,有更好的饮食几乎任何东西.这只鹰折磨龟的喜悦.
当然,什么鹰没有意识到的是,它是在参加一个很粗的自然选择的形式.
一天,一只乌龟会学会飞翔.