The interesting question from the standpoint of economic theory is, why did it have that funny shape?

从经济学理论的角度来看,期限结构的走势为什么会这样呢

耶鲁公开课 - 金融市场课程节选

And it probably--One--There's--Evolutionary psychologists debate the function of why we talk funny to babies.

进化心理学家们在争论,我们为何要以如此好玩的方式来同婴儿讲话

耶鲁公开课 - 心理学导论课程节选