And in fact, one of the lessons you may already be realizing with P sets is that things seem to take twice, three times, four times longer than you actually might think.

从习题集中你可能已经得出的一个教训就是,程序所花的实际时间往往是你开始以为的两倍，三倍，四倍甚至更长。

哈佛公开课 - 计算机科学课程节选

The yield-to-maturity on an indexed bond is already in real terms because the coupons are indexed to inflation.

这种债券的到期收益率,就是实际收益率,因为票息已经被通胀指数化了

耶鲁公开课 - 金融市场课程节选