translation.en: So, it turns out we actually had this idea nine years ago, and that's about the time constant for how long it takes to do these kinds of things, so I think we made a lot of progress.
translation.zh: 实际上,我们九年前就开始有了这一想法 这大约就是做这件事必须得投入的时间 我觉得我们有很大进步.