We discussed the California digital textbook program as well as the use of digital textbooks in general.

VOA: special.2009.12.31

That term was actually coined by economists, Prescott and Mehra; it's now in general use. That is, it just seems that stocks so much outperform other investments.

这个术语是由经济学家,普雷斯科特和梅拉提出,现在被广泛引用,这表明股票收益远超其他投资

耶鲁公开课 - 金融市场课程节选

And in general, what I would say is, when in doubt, use parens. OK.

因此通常上，我会告诉大家的是，当有疑问的时候，请用括号，好。

麻省理工公开课 - 计算机科学及编程导论课程节选