A perpetuity is an asset or a contract that pays a fixed amount of money each time period, forever.

永续年金是一种财产或者合同,规定在每一时间段内,支付一定数量的货币,直至永远

耶鲁公开课 - 金融市场课程节选

We're in a time period where the economy has changed dramatically in the last few years.

我们现在所处的时期在前几年经历了巨大的经济变化。

现在的商业新闻 - SpeakingMax英语口语达人

This is the present value of $1 in one time period, which I'm taking to be a year.

这就是一美元在一段时期内的现值,我只是将一美元持有一年

耶鲁公开课 - 金融市场课程节选

You've got to ask yourself, let the time it takes to do a full circle, that's the time period, do a full circle.

你已经问你自己了,留足够的时间让它运动一整圈,那就是运动整个圆周的时间周期

耶鲁公开课 - 基础物理课程节选

But at the time period that we are examining, the period in which he writes Comus, the early 1630s, Milton seems very much interested in remaining virginal forever, avoiding even the sanctioned loss of virginity which is the state of marriage.

但在我们研究这段时期时，17世纪30年代初他写《Comus》的时期，弥尔顿似乎还对永远保持童贞非常感兴趣，甚至避开支持婚姻所必须经历的一个阶段,失去童贞。

耶鲁公开课 - 弥尔顿课程节选

It began to infiltrate other disciplines and was in general a high-spirited horse for that certain period of time.

它逐渐渗入到其它学科,总之是那个时代的一匹黑马。

耶鲁公开课 - 文学理论导论课程节选

It's also going to be the process of watching an artistic form unfold over a very exciting period of time.

更是一个观察某种艺术形式在一段,刺激的时间里展现的过程。

耶鲁公开课 - 1945年后的美国小说课程节选

And there was the confluence of religion and business and science and all of these things that changed dramatically at about that period of time.

当时宗教，商业,科学等等都有了交叉点,它们在那个时期发生了巨大的转变。

普林斯顿公开课 - 人性课程节选

And it turns out that simply by counting the number of those spikes that occurs at a period of time.

随后，只要数一数在一定时间内,产生的尖峰脉冲的数量。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

But in all likelihood Hebrews of an older time, the patriarchal period, the second millennium BCE--they probably weren't markedly different from many of their polytheistic neighbors. Archaeology would suggest that.

但很有可能更早的，西元前2000年族长统治时期的希伯来人，他们可能和其他信仰多神论的异邦人,没有什么太大的不同，这一点考古学会帮我们证明。

耶鲁公开课 - 旧约导论课程节选

We did that, we came up with very good Chinese search engine technology, and we signed up a lot of the Chinese portals in a very short period of time.

我们开发了,很好的中文搜索引擎技术，并在短期内，和许多门户网站公司,签了合约。

斯坦福公开课 - 百度CEO李彦宏演讲：全球最大搜索引擎的发展课程节选

Clearly, important information is to be conveyed to students from people who settle in the fields for a long period of time.

显然，对某个领域,进行长时间研究的学者,会将重要的信息,传达给学生。

麻省理工公开课 - 媒体、教育、市场课程节选

My watch was dissembled for a period of time, perhaps we should say my watch didn't exist during that period of time.

我的手表在修理的时候消失了，我们或许该说我的手表,在修理的那段时间，并不存在。

耶鲁公开课 - 死亡课程节选

In other words what happens to people's health as they lose weight and then regain it repeatedly over a period time?

换言之,在一段时期内反复增重减重,对人们的健康有什么影响

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

If I can run the gel for some period of time, run the electrical field, spread it out.

我将凝胶通电一段时间后,在电场作用下,就会分散开来

耶鲁公开课 - 生物医学工程探索课程节选

Although, maybe it will be in a short period of time as we continue to grow.

可能随着公司发展,会有所变化。

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选