in a positive world bettering sort of way, or is that merely sort of nonsense to think about?

能够积极地改进这个世界，还是说他们的研究都是空洞的东西呢？

普林斯顿公开课 - 人性课程节选

That's part of public finance--is learning how to modify the tax system so that it works pretty well.

公共财政学的一个课题就是,研究如何改进税收制度，使其更有效。

耶鲁公开课 - 金融市场课程节选

One that was developed a number of years ago but has been perfected and refined in recent years with very, very good research.

该概念很多年前就已经提出了,但在近年通过高水平的研究才被改进完善

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选