the speed of the money circulation of economy fell to the lowest level in fifty years.

现金流转的速度,降到了50年来的最低点。

斯坦福公开课 - 经济学课程节选

and it wasn't until maybe fifty years later that cars came in

而且差不多直到50年后，才有了汽车，

旧金山的公共交通 - SpeakingMax英语口语达人

It probably won't even in exist in fifty years but it will be bought by some other company and it will still have value and will still be going up.

也许50年后公司不再存在了,但它可能会被,别的公司收购,股票就还有价值,并仍可能升值

耶鲁公开课 - 金融市场课程节选

That has been a frequent source of the criticism of the New Criticism in its afterlife over the last forty or fifty years.

这也是新批评派,在过去四五十年的,理论根据之一。

耶鲁公开课 - 文学理论导论课程节选

There is another aspect of the way in which the New Criticism has been criticized for the last forty or fifty years which needs to be touched on.

新批评主义还在一个方面,受到看批评,在我们研究的过去的四五十年里。

耶鲁公开课 - 文学理论导论课程节选

All of this the New Criticism had a great deal to do with-- and when I talk next time about the way in which it's been vilified for the last forty or fifty years, naturally I will have this in the back of my mind.

这些都跟新批评派有关-,等我下次再说到这个,在四五十年前饱受诋毁的文学鉴赏方式的时候，我还会想起今天所说的话。

耶鲁公开课 - 文学理论导论课程节选