So scientists are using robotic devices that can dive far below what people have seen in the past.

VOA: special.2009.01.13

- Part of the compulsion to repeat is, in a certain sense-- part of the hope of mastery in the compulsion to repeat is to keep up the kind of vigilance which you failed to have in the past and therefore fail to ward it off.

所以强迫性重复一部分可能是由于-,一种希望，人在重复回忆的时候,感觉可以保护自己，控制不让灾难再次发生,以便不会再次失足。

耶鲁公开课 - 文学理论导论课程节选

You use this pattern whenever you want to express that you have experienced something in the past previously.

每当你想表达你之前已经经历过某事的时候，你就可以用这个句型。

I've already 课堂 - SpeakingMax英语口语达人

"I brought in two mountain bikes that my wife and I have ridden for the past ten years.

VOA: special.2009.11.16

I only want to suggest to you with this long preamble that much of the work that lies before us is actually in the past and we have already accomplished it.

我之前讲这么多，只是想让大家知道,这么多的疑问我们之前已经遇到了,并且已经解决了。

耶鲁公开课 - 文学理论导论课程节选

She says her students over the past several years have increasingly used less formal English in their writing.

VOA: special.2010.01.28

It was amazing in the past and Tal we actually have extraordinary teaching staff here with us.

它过去就很棒，而且我们有一个很出色的教学团队。

哈佛公开课 - 幸福课课程节选

Mars landers and rovers were designed to look for signs of liquid water that may have flowed on Mars in the distant past.

VOA: special.2010.07.28

Obviously philosophers in the past have speculated about life after death.

显然，过去的哲学家们已经,在猜测是否有来世。

普林斯顿公开课 - 人性课程节选

The Mayo Clinic tells patients to avoid strong smells that have seemingly started migraines in the past.

VOA: special.2010.03.30

If you will P-function again, if you have been P-functioning in the past and you will be P-functioning again in the future, P-functioning for person functioning, you will be P-functioning again in the future, then you're not dead.

只要你还可能再度拥有人格功能性，以前有过人格功能性,以后也会有人格功能性，人格功能性就是作为人的各种功能，你将来能够再次拥有人格功能性，你就没有死。

耶鲁公开课 - 死亡课程节选

In the past,children have died or suffered permanent harm from Reye's Syndrome during widespread influenza attacks.

VOA: special.2009.10.20

So what you have is the account of Richard and his friends talking in the past, and you have the present narrator's parsing of how this language relates to topics that impinge upon their very context, the racial realities of the South.

理查和朋友的对话,呈现在面前，同时加入了陈述,关于这语言如何与影响上下文的话题相关，文中提到南方的种族现实。

耶鲁公开课 - 1945年后的美国小说课程节选

This raises the exciting possibility that life may have existed in the past on Mars.

VOA: special.2009.12.30

It has often been pointed out that in the past 4000 years more wars have been fought for the possession of the tiny strip of land known as Canaan, or the land of Israel, or Palestine, than have been fought for almost any other area in the world.

很多人指出，在过去的4000多年中,为了占领这一小块土地，有过多次战争,这块叫迦南，或以色列或巴勒斯坦的土地，这些战争远多于世界其他地区。

耶鲁公开课 - 旧约导论课程节选

Over the past year, groups that care for homeless people have seen an increase in the number of people in need because of the nation's economic crisis.

VOA: special.2009.01.28

In the absence of that, the states have actually taken action, over the past, maybe 5, 10 years

在这种法律空缺的情况下，各个州在过去的五到十年间已经采取了行动，

全球变暖与国力 - SpeakingMax英语口语达人

But new eggs have appeared in two nests over the past year.

VOA: special.2009.12.16

I think it's much severe than what you have experienced in the past year or two for the general economic situation.

甚至比过去两年的经济形势,还要严峻。

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

In the past,only healthy people have had their genomes fully sequenced.

VOA: special.2010.03.23

The interesting thing is that through time, as political winds change, these taxes have changed and they've gone up to some very high levels in the past in the United States and other countries.

有趣的是在不同时期,如果政策方向有所转变,税率也会改变,在过去的美国和其他国家,税率曾经相当高

耶鲁公开课 - 金融市场课程节选

We have shipped to Namibia and the Gambia in the past.

VOA: special.2009.11.16

So this is perhaps a site that some of you have spent way too much time on last year, if not in the past week or so, com this is isawyouharvard.com.

很多同学去年的时候,在这个网站上花费了很多时间，可能上周还玩了，这个网站的网址是isawyouharvard。

哈佛公开课 - 计算机科学课程节选

"In the past two years, candidates are not seeing social media as a place that we have to keep private from prospective employers but as a tool that will assist in my search."

VOA: special.2011.05.13

I'm sure some of you have dealt with electrophoresis gels in the past and it's really just a slab of something like Jell-O where you can put a sample at one end of the Jell-O, your sample of fragmented DNA.

我相信在座肯定有些已经接触过电泳凝胶,真的挺像一块板状果冻的,你可以把一段样本放在"果冻"的一端,你的DNA片段样本

耶鲁公开课 - 生物医学工程探索课程节选

Accepting the award, she talked about the entertainment business and some of its stars who have died in the past year.

VOA: standard.2009.09.21

and so I trust that it's easily intelligible as I read it to you now.] In fact, however, we have given up the claim to find, in the past, any truth valid and intelligible for ourselves.

所以我相信现在我读的时候大家一定会更容易理解],事实上，我们已经放弃了从过去中寻找,对于自己来说靠得住的，可以理解的事实。

耶鲁公开课 - 文学理论导论课程节选

Captain Camara says those political leaders have made mistakes in the past and the support for him now makes them afraid.

VOA: standard.2009.08.25

United Nations officials say about 40,000 Tamils have returned to their villages in the past two weeks under Colombo's resettlement plan.

VOA: standard.2009.11.09

For the past five weeks,British forces have been clearing the territory between Lashkar Gah and Girishk in Afghanistan's Helmand Province.

VOA: standard.2009.07.27