The thirty-year mortgage came in the early 1950s but it seems to have gotten stuck at thirty-year.

0世纪50年代初出现30年期的贷款,这之后期限不再增加

耶鲁公开课 - 金融市场课程节选

In our first Yeats lecture, I was talking about Yeats's early development and stylistic transformation over the course of, roughly,a twenty-, twenty-five year period.

在我们讲叶芝的第一节课，我谈到叶芝的早期发展,以及他创作风格的转变，在大约20到25年的时间里。

耶鲁公开课 - 现代诗歌课程节选

The typical -I'm going to talk about the conventional thirty-year mortgage, which has been a standard in the United States ever since the early 1950s.

典型的抵押贷款,我先介绍普通30年期抵押贷款,从20世纪50年代初起,它就是美国抵押贷款的标准期限

耶鲁公开课 - 金融市场课程节选

In that year, we were early on in terms of diversifying the portfolio -we'd only been working on that program for two years -and even so,the negative return was less than 1%, so it was a modest negative return.

在那一年,我们还处于投资组合多元化的初期,刚刚开始2年,即便如此,股灾时我们的亏损小于1%,这只是一个轻微的亏损

耶鲁公开课 - 金融市场课程节选