The boy would go say, we're offering to pay a discount rate of 2.51-- that was the formula and then anyone could do these calculations; they knew what it meant.

小男孩跑去说,我们愿意以2.51%的折扣率买入,公式就是那样用的,每个人都能算出价格,他们知道是什么意思

耶鲁公开课 - 金融市场课程节选

when other people that might not have been involved with the sport wouldn't really know what to do.

而或许没参与过这项运动的人连做什么都不知道。

体育相片的魅力 - SpeakingMax英语口语达人

What's the empirical information that everybody knows?

每个人都知道的,经验信息是什么？

麻省理工公开课 - 热力学与动力学课程节选