我可是个经济学家，这个“沉闷科学”的教授，在经济学看来，天下没有免费的午餐，有好处就必有相应的成本，那些听起来难以置信的好事几乎无一例外真的不是好事。
I am an economist – a professor of the Dismal Science, in which there are no free lunches, in which benefits are always balanced by costs, and in which stories that sound too good to be true almost inevitably are.