It has grown enormously and really provides a way for students who have creative innovative ideas about how they could create social change, and the Pay Center works with them and tries to implement those ideas.

现在它的规模扩大了很多，真正能帮助,有创新思想的学生,实现社会的改革，和这些学生们一起工作,来实践这些理念。

普林斯顿公开课 - 人性课程节选

Oftentimes, inventions that seem, in the abstract, to be good ideas may be impossible because something that you have to do to make it actually come into practice is too expensive and so it's not economic to produce the invention.

通常在理论上,创新固然不错,但却很难实现,因为把创意变成现实,花费会相当的昂贵,实现这样的创意非常不合算

耶鲁公开课 - 金融市场课程节选