2. As we pointed out earlier, we've long been able to restore hearing to the deaf, but restoring sight to the blind is a much more complicated matter. When people lose their sight, their retinas no longer send signals from their photoreceptors to their brains. To make an artificial eye, we'd need to understand how the retina processes those signals, and that's a code scientists just haven't been able to crack.
5. Sure, all of the hosting companies offer a basic CMS (content management system). But do they offer the flexibility that you need to get found online? Probably not. WordPress is an open-source CMS that you can install, customize and continuously optimize. You will likely need someone with development experience to help with set up, but once the template is installed, you’re probably smart enough to publish content without any assistance.
从一开始，社交网络就被有效地隔离在互联网之外。比如，Facebook的海量内容通常不会显示在谷歌( Google )搜索结果之中。但是否非得是这种情形？比方说，Twitter搜索结果自动出现在一个标准的谷歌搜索显示页面，岂不是更方便？再比如，当你搜索Yelp时，为什么关于某家餐厅的最新Twitter消息没有显现出来呢？由于利益相悖，不同社交网络往往把各自的内容封锁在专利保护墙之内，但也有不少工具致力于创造性地弥合这道鸿沟。需要说明的是，本文作者的公司已经开发出了这样一种工具。