I got interested in that particular question because one of our former PHD students who is now at Texas A&M, asked me to give a lecture on that subject in honor of some anniversary of the universities.

我对这个问题也感兴趣,因为我们学校的一名博士毕业生,现在在德克萨斯农工大学，请我就这个话题演讲,当时是大学的周年纪念日。

普林斯顿公开课 - 人性课程节选

fifty years? No, it was the 50th anniversary of Frank Lloyd Wright.

五十年？是了，是弗兰克•劳埃德•瑞特的五十周年纪念日。

艺术画廊，来吧 - SpeakingMax英语口语达人