过去从未死去。它甚至还没有过去。
"The past is never dead. It's not even past."
——温铁军谈农民工问题的解决
每一个生命都是一个故事，每一个故事都是一个生命。
I work hard, and I do good, and I'm going to enjoy myself. I'm not going to let you restrict me.
The beauty of instrumental variables is that they allow us to see the world in a new light.