When it does happen, when the idea comes and you wrestle to place the words that express exactly what it is that you want to say, what it is that the meaning you're wrestling for.

当其真的发生时,你绞尽脑汁,希望写出,能准确表达它的文字，你苦思冥想，究其含义。

普林斯顿公开课 - 人性课程节选

The reason for that was that in the east and in south, the Greeks lived among people who were more civilized than they, who were more advanced.

究其原因,在东方和南方,希腊人生活在比他们更文明,更先进的民族中间

耶鲁公开课 - 古希腊历史简介课程节选

The reason is because there are two different approaches to deal with illness: one,the positive psychological approach is that the illness is the absence of health, as opposed to health is the absence of illness.

究其原因，是因为有两种不同的方法,对付疾病，一是积极心理学方法,它指的是，疾病相当于不健康，相对地，健康等于没疾病。

哈佛公开课 - 幸福课课程节选