At that point, we must admit that it is irrational to spend time on long conversations with friends if it is time stolen from inventing, say, new software (unless the conversation helps the invention). For Wolfers, it is a coincidence that what earns him the most money, economics, is also what he most enjoys doing.
在这一点上，我们必须承认把发明（比如）新软件的时间用于和朋友们摆龙门阵是不理性（除非你们的谈资有利于发明）。对沃尔夫斯来说，给他带来最多金钱的活动——经济学研究恰巧也是他最喜欢做的事情。