Now the other point here is that "the definition" of recession seems to be evolving... What you gave... -Didn't I give the statement that ? you gave this to your students what I just gave, right?

关键还在于,对于经济衰退的定义尚无定论。,你刚才给的版本。。。，-难道我的陈述,你教给学生的也是这个版本吧？

斯坦福公开课 - 经济学课程节选

The question, of course, is what scholars have disagreed about and continue to disagree about, because the evidence simply will not permit any confident answer, but I ought to just mention a few of the theories that have been tossed around, a few among many, many, many.

而这个问题,是学者曾经争论不休,而且至今也尚无定论的,因为以目前的证据,不能得到任何确切的答案,但我需要,就一小部分广为传播的理论做些说明,这些只是各种理论中的一小部分

耶鲁公开课 - 古希腊历史简介课程节选