And so what I do is, I write computer programs that study very large sets of these footprints, and then try to draw conclusions about the people who left them -- what they feel, what they think, what's different in the world today than usual, these sorts of questions.
所以我做的事情就是，编程序 搜集和研究大量的这些痕迹， 然后尽量从中得出关于留下痕迹的那些人一些结论，™ 比如他们有什么感觉，他们想些什么， 今天的世界和以往有哪些不同， 诸如此类的问题。