Jack Benny became famous nationwide in the nineteen thirties as a result of his weekly radio program.

VOA: special.2009.10.11

The interesting thing is, actually everyone calls it the Paulson proposal, but it was apparently mostly written by a young man who is in his early thirties You may not consider that young but I think that is young.

有趣的是，虽然每个人都称那个改革为鲍尔森计划，但很明显这个计划大部分是由一个青年男子写的,他才刚刚30岁,也许你们不认为30岁很年轻,但是我觉得是。

耶鲁公开课 - 金融市场课程节选

But the father lost his money in the great economic Depression in the nineteen thirties.

VOA: special.2009.11.29

A man also in his twenties or thirties rocks back in his seat.

VOA: special.2009.08.31

In the early nineteen thirties Jack Benny got his own radio show.

VOA: special.2009.03.09

However, his life took a different turn in the middle nineteen-thirties.

VOA: special.2010.03.07