If you are tired after hitting all those nails on the head, then it is time to hit the hay.

VOA: special.2009.09.20

What was neat about it is before that time, the predominant species to use for air conditioning or refrigeration was ammonia.

在这之前是很整洁的，之前最主要的用于空调或者冰箱的,物质是氨。

麻省理工公开课 - 固态化学导论课程节选

I guess, I, I think the reason I did is because about the time to do it is college, I think.

我想，我认为我这么做，是因为大学该是时候这么做了。

留学的优点是？ - SpeakingMax英语口语达人

"Mr.President," he said, "at this time it is suicide -- murder and will lose us every friend in the North.

VOA: special.2009.08.06

Well, if this thing is going to vibrate for any length of time it better be a standing wave.

好的，如果它在任意时间振动,那它就是驻波。

麻省理工公开课 - 固态化学导论课程节选

But one possibility, he says,is that it may take time away from sports or other activities that could help prevent depression.

VOA: special.2009.03.10

At the same time it's also clear that this epiphany is a remembered experience. It's recalled.

同时很明显这一顿悟,是一种记忆经验，它是被召回的。

耶鲁公开课 - 现代诗歌课程节选

That is the amount of time it took Associated Press photographer Joe Rosenthal to capture a historic image on film.

VOA: special.2010.05.31

One is time, that I think it takes certain amount of time to shed the thoughts, the anxiety in everything else.

第一是时间，要想,摆脱一些想法，摆脱焦虑，是需要一定的时间的。

普林斯顿公开课 - 人性课程节选

It is night time. And the only sound that can be heard is the long, lonely whistle coming from the train's engine.

VOA: special.2010.06.13

One way to mark time is to imagine it carries a clock as it moves, and put markers every second.

标记时间的一种方法是,想像它带着时钟运动,并且每秒做一次标记

耶鲁公开课 - 基础物理课程节选

It is that time of year again. Warm weather means outdoor music festivals and one of the biggest is happening right now.

VOA: special.2009.05.01

What's shown in this diagram is the progress of the developing embryo as it travels in time, down the fallopian tube.

这张图上显示的,就是胚胎发育的过程,是按照它在输卵管中移动的时间排序的

耶鲁公开课 - 生物医学工程探索课程节选

But one possibility,he says, is that it may take time away from activities that could help prevent depression, like sports and socializing.

VOA: special.2009.02.11

And so it's not, perhaps, crippling if this is the conclusion we reach, but at the same time it's not the only possible conclusion.

因此，如果这就是我们的结论，也没有太大关系，但同时要知道这不是惟一可能的结论。

耶鲁公开课 - 文学理论导论课程节选

Jerry Glover says it is time to put natural plant communities back in control of our land.

VOA: special.2010.09.22

And the reason is, and this will come up on the problems and a lot of students end up using this equation, which is why I want to head it off and mention it ahead of time, we can't use an equation because this equation is very specific for light.

原因是，很多同学在解题时,都会用这个方程，所以我要,事先提醒你们一下,我们不能用这个方程，因为它只对光是用。

麻省理工公开课 - 化学原理课程节选

It is the first time that the world's biggest sports event will be held in Africa.

VOA: special.2010.06.09

If you never meditate before, this is a wonderful opportunity to do it for the first time.

如果你从没冥想过，这是你们尝试的好机会。

哈佛公开课 - 幸福课课程节选

Which is a way of saying it is time for me to finish this program.

VOA: special.2010.01.17

You want to write the specs so that everybody does in fact know what this piece of code is doing, and you're writing it each time around.

但是你得养成良好的习惯和编程风格,你得撰写规范说明从而保证,每个人都知道这段代码是干什么的。

麻省理工公开课 - 计算机科学及编程导论课程节选

But it is the first time an amino acid has been discovered on a comet.

VOA: special.2009.09.30

That's a question for you: is it the greatest love story of our time?

我问你们，这是我们时代最伟大的爱情故事吗？

耶鲁公开课 - 1945年后的美国小说课程节选

Now it is time to come back to the world of the twenty-first century.

VOA: special.2010.02.03

Your mortgage payment is constant through time but the fraction of it that goes to paying off principal versus interest changes through time and it just changes as dictated by this formula.

抵押贷款每月还款是固定的,但是其中本金和利息的比例关系,会随时间而改变,这是由这个公式所决定的

耶鲁公开课 - 金融市场课程节选

It is the first time the well known film actress has performed on Broadway.

VOA: special.2010.03.12

If there was a time to go too fast it was probably last time, because it turns out this is something that's covered well in the textbook, so it's covered in chapter six of the textbook.

如果真有哪次讲得太快,可能就是上次,因为这些内容,已经在课本上写得很清楚了,就在课本的第六章

耶鲁公开课 - 博弈论课程节选

He said it is time for the Iraqis to take responsibility for their country.

VOA: special.2009.04.11

I think the reason why triathlon is not so, so big is just because it requires a lot of time.

我认为铁人三项运动之所以不够普及，
是因为它需要大量的时间。

对体育项目的热爱 - SpeakingMax英语口语达人

When, you know, studies is like getting really hard because it's like midterm time or final time.

每当期中或期末考试来临，功课很难的时候，

想吃中餐的时候 - SpeakingMax英语口语达人