translation.en: On this next slide, is an interesting history of what we really have seen in infrastructure, because whether I give you a perfect Skycar, the perfect vehicle for use, it's going to have very little value to you unless you've got a system to use it in.
translation.zh: 下一张幻灯片是一个很有趣的故事 这是交通基础设施的发展历史， 因为不管我是否给你一辆完美的飞天车 它都将是无用的 除非我们有这样的交通基础设施来供我们使用。