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

And obviously within this long period many many different ideas and perspectives were involved within each side of conflict.

很明显，很久了,非常多的不同的观点和看法,出现在冲突的双方之中。

普林斯顿公开课 - 人性课程节选

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

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

VOA: special.2010.01.12

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

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

VOA: special.2009.02.10

From 1983 to the present as you just said, the economy has a long period of smooth, robust expansion interrupted by two very mild recessions.

第二时期是从1983年至今，正如你所说，经济长时间处于,平稳强健的发展状态,而只出现了两次轻度衰退。

斯坦福公开课 - 经济学课程节选

The results suggested that people do act differently if they think they are working with a group for a short period of time instead of a long period.

VOA: special.2009.03.03

If he's going to sit there on one chord for that amount of time, it's going to go on for a long period of time.

既然作曲家能放任一个和弦行进这么久，他一定有的是时间。

耶鲁公开课 - 聆听音乐课程节选

So,to get a sense of what the regional moisture patterns have been, dryness and wetness over such a long period of time in great detail, I would call it a kind of victory for paleoclimate science."

VOA: special.2010.05.25

So, the process of developing a vaccine occurred over a long period of time.

疫苗的发展经历了很长一段时间

耶鲁公开课 - 生物医学工程探索课程节选

"This experiment is unique because six people will be isolated for a long period of time and will work autonomously."

VOA: standard.2010.06.02

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

No single space project in this period will be more impressive to mankind or more important for the long range exploration of space.

VOA: special.2009.07.08

They can be on store shelves for a long period of time, and that has to do with the economics of food, especially food available to the poor, which we'll discuss later.

因此可以在商品货架上销售很长一段时间,这也与食物的经济学价值有关,特别这类食物穷人也买得起,这个我们以后会讨论

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Long-period comets,however, may take several hundred years to orbit the sun.

VOA: special.2011.02.09

There was certainly a long period of time in which I found the personality theory, that is,the personality theory with a no branching rule, to be the better and more plausible theory.

有一段时间内，我觉得无分支理论下的，人格理论，是更好更合理的理论。

耶鲁公开课 - 死亡课程节选

Each exercise period should be at least ten minutes long.

VOA: special.2010.06.08

Even if you imagine that slaves did the work, you would need a hell of a lot of them, over a long period of time, and you had to feed them, if nothing else.

哪怕你想象这个墓穴是由奴隶所建造,那也一定是成千上万的奴隶,经过了相当长的时间工作,至少,你还要养活这些奴隶

耶鲁公开课 - 古希腊历史简介课程节选

"Now the Long March is for an indefinite period.

VOA: standard.2009.03.15

Let's say that you've gotten into a disagreement and there's a long period of silence.

假设你们意见相左，你们陷入长时间的沉默。

Is there any 课堂 - SpeakingMax英语口语达人

The Final will not be held in the exam period, because I like to take long vacations.

期末考试不会拖到考试周,因为长假的魅力实在太大

耶鲁公开课 - 心理学导论课程节选

Stocks have paid 4% more a year over this incredibly long time period than short-term bonds.

股票在相当长的一段时间里,每年都比短期债券投资收益率,高出4个百分点。

耶鲁公开课 - 金融市场课程节选

The period, that's right. So, it's going to take one period to move that long. And another way 1 we can say period is just 1 over nu or 1 over the frequency So, now we know both the distance traveled and the time the elapsed.

还是？周期，对的,它需要一个周期的时间,另一种说法是周期是,除以nu，也就是1除以频率,现在我们同时知道了。

麻省理工公开课 - 化学原理课程节选

Let's say oftentimes orchestral musicians, they're sitting there and they're not playing so they have to be able to count for a long period of time.

时常,管弦乐团的乐手们坐在那里,却不需要演奏,因此他们不得不打很长一段时间的拍子

耶鲁公开课 - 聆听音乐课程节选

That's where I--once that gets going, it goes for a long period of time.

一旦开始了,就喋喋不休

耶鲁公开课 - 聆听音乐课程节选

He has data for a very long time period, 1802 to 2006, for the U.S.

他的数据是采用美国从1802年到2006年，相当长的一段时间。

耶鲁公开课 - 金融市场课程节选

That's where you're just asked over a period of time, how often you eat this list of foods and you're given a very long list of foods.

正如同你们刚才问的,你多久吃一次这些食物,你有一个很长的食物列表

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选