But in a recent study they declared that forty percent of the tweets captured over a two-week period were "pointless babble."

VOA: special.2009.09.14

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

or if it's over a long period of time and it's an ongoing situation that you want to get rid of.

或者是一件持续了很久的事，你特别想摆脱它。

I'm afraid of 课堂 - SpeakingMax英语口语达人

But this home contains over 2,000 pieces of art organized from room to room by period and by geography.

VOA: special.2009.01.11

The little insects were crawling around, the plants were there. And come back and look at it, over a period of weeks, and see what's changing.

我可以看到昆虫爬来爬去，还看到有些植物，几个星期后，再来看，看看发生了什么变化。

普林斯顿公开课 - 人性课程节选

Medical experts say small amounts of carbon monoxide over a long period of time can greatly harm an unborn baby.

VOA: special.2010.02.02

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

A recent study showed that RTS,S reduced clinical cases of malaria by fifty-three percent over an eight month follow-up period.

VOA: special.2010.04.20

Suppose someone has a contract that promises to pay an amount each period over a number of years.

假设某人有一份合约,承诺在数年内的不同时段内分开支付

耶鲁公开课 - 金融市场课程节选

"American exports grew almost seventeen percent over the first four months of this year, compared to the same period last year.

VOA: special.2010.07.09

And you have pretty good ideas of what these mortgages behave like over a period of time.

你就能知道,这些新增贷款情况如何了,这需要一段时间。

斯坦福公开课 - 经济学课程节选

Researchers in the United States say drinking a lot of alcohol over a short period may influence genes involved in bone formation.

VOA: special.2010.08.31

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

They used information gathered over a period of 20 years, until 2003, in the Framingham Heart Study.

VOA: special.2009.01.21

you with your youth, with your opportunities to develop over a longer period than I have.

你们还年轻，有许多发展的机会,有比我更长的时间。

麻省理工公开课 - 电影哲学课程节选

The researchers studied the diets of thirty-one thousand children ages two to eighteen over a thirty-year period.

VOA: special.2010.03.17

Whoever was writing the poems of Homer, whichever poets were contributing to that over the ages after the Mycenaean Period, they hadn't seen those Mycenaean sites.

不管是谁写的《荷马史诗》,无论那些诗人在迈锡尼文明之后,为该作品作出了多大贡献,他们都没见过迈锡尼文明遗址

耶鲁公开课 - 古希腊历史简介课程节选

They found that over a period of six years, planting three rows of trees reduced total dust and ammonia by more than half.

VOA: special.2009.09.08

So now somebody can get an artificial hip and they can live for many decades with it and have almost full function of that hip over that period of time.

所以现在患者可以使用人造髋关节,再活上几十年,而且几乎和正常人没一点差别

耶鲁公开课 - 生物医学工程探索课程节选

The rock formations there are the result of deposits made by ancient lakes and rivers over a period of about twenty million years.

VOA: special.2009.04.15

And what happened is, over a 30-year or so period, the industry really shifted to be one where industry standards started to come into play, the customers started to have a bigger role.

经过了30年左右，这个行业发生了变化,出现了产业标准，消费者的角色也越来越重要。

斯坦福公开课 - 戴尔CEO-Michael.Dell谈创业和发展课程节选

The unusually long period of cold weather has shown how even warm climates can sometimes freeze over.

VOA: special.2010.01.12

An interval is over a period of time.

时间强化则是间隔一定时间才给予奖励。

耶鲁公开课 - 心理学导论课程节选

Volunteers received vaccinations over a period of six months and were tested for H.I.V.

VOA: special.2009.09.30

Now,that has changed, for sure; but,the centralization of the French government and the domination of Paris over the life of the nation is very difficult to change, over a long period of time.

现在,情况已经发生了改变,但是法国政府的中央集权化,以及巴黎在国民生活中的支配地位,在相当时间段内,都很难得以改变

耶鲁公开课 - 1871年后的法国课程节选

"The Lost Symbol" takes place in Washington,D.C., over a period of just twelve hours.

VOA: special.2009.10.09

And eventually, over this twenty-year period he did get it to work just right.

最后,经过了二十年,他确实做到了

耶鲁公开课 - 聆听音乐课程节选

Doctors use it to control moderate to severe pain over a long period.

VOA: special.2009.02.10

These materials emerged over a period of centuries; that's clear.

我们所清楚的是这些内容出现了好几个世纪。

耶鲁公开课 - 旧约导论课程节选

We perceived over a period of 5 or 10 minutes to have made all those arm movements.

我们注意5-10分钟,就能得到手臂的运动。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选