In fact, it took Mother Nature 540 million years of hard work to do this task, and much of that effort went into developing the visual processing apparatus of our brains, not the eyes themselves.
事实上，大自然经过了5亿4千万年的努力 才完成了这个工作， 而这努力中更多的部分 是用在进化我们的大脑内 用于视觉处理的器官， 而不是眼睛本身。