研究不仅仅是回答问题，还要提出正确的问题。

——凯文·史密斯回忆与斯图尔特的合作经历。

A writer is someone who pays attention to the world.

The function of entrepreneurs is to reform or revolutionize the pattern of production by exploiting an invention or, more generally, an untried technological possibility for producing a new commodity or producing an old one in a new way.