My name is Tom Chi. I spent two years of my life building the user experience team for the Google X division（[数] 除法） of Google. And it's a place I affectionately called the Department of Science Fiction because of the futuristic nature of the types of projects we took on. Self（自己）-driving cars, Google Glass, and other things that you'll see soon enough. So for those who haven't heard of this project, this is what Google Glass looks like. It allows you to overlay（ 覆盖） digital things into your eyesight while still maintaining（维持） being part of a world.

  So if I were to pull out my cell（细胞） phone and look into it, I'm basically（基本上） out of this world now. Like（喜欢） I'm in my own little cell（细胞） phone, tablet world, what have you. But Google Glass has the vision（视） of allowing us to continue to be in the world, but also have access（通路） to the digital things that we need and we love. Now, I'm going to ask you a really simple question about Google Glass. How would you prototype（原型） this experience? How long do you think it would take you to make the first working（工作） version（版本） of a heads-up display（显示）?

  Okay（好）. A little bit on the long side. The answer is one day. And here's what it looked like. So basically the magic（魔术的） piece is the coat hanger. The coat hanger, I bent（使弯曲） it in a specific shape and the top loop（环） goes around your neck and then the bottom loop（环） rests against your chest.

  And it allows me to carry a piece of plexiglass on which a little sheet protector（保护者）. So these are the things that you put your book reports in so they don't get wet. Literally（照字面地） got at the drug store. You know, have it out at the end of the plexiglass. And then it gets projected（伸出） onto with the piker projector（[仪] 投影仪） that's connected to a netbook. And using this set（[数] 集合）-up, within（在……之内） one day we were already able to start having the experience of what it looks like to have digital things overlaid on your physical world, be able to move around with it, and also use the netbook to try out tons（吨） and tons（吨） of different ideas around software（ 软件）.

  Now, after you start getting something like that working, you know, a really important problem comes up. Like, you're wearing this thing on your head. It's like a pair of glasses. So you don't have a mouse or a keyboard（键盘） or a touch（触） screen, all the ways that you're used to interacting（互相影响） with a machine. So we thought for a second, well, maybe we could do something like, you know, what was shown in Minority（少数民族） Report. So for folks（人们） who haven't seen that, basically Tom Cruise（巡航） is manipulating（操纵） software（ 软件） with his hands in front of his face and photos are flying over here and his emails are over here and so on and so forth.

  So that's the same question again. How long do you think it would take to have the real experience of doing something like that? Two years.