You do not have to dress to the nines, or wear your best clothes, for this kind of work.

VOA: special.2009.07.26

But hopefully, you will not be satisfied to just make a general statement here when we do have these glitches.

但是希望，大家不会仅,仅因为大致符合就满意了,毕竟还有些小偏差。

麻省理工公开课 - 化学原理课程节选

You can use it to show that you have or do not have, posses or do not possess, something tangible or intangible.

你可以用它来表示你有或者没有的东西，不管是这些东西是有形还是无形，都可以通用。

I have 课堂 - SpeakingMax英语口语达人

Friends and relatives do not even have to go to the store to choose a gift from the registry.

VOA: special.2010.08.09

This is a sign of my economic status: I don't have to work. It is middle and lower-class women who do not get to observe purdah in this way.

但这恰好是我经济地位的标志：,我不需要工作，只有中下阶层的女人,才像这样不遵守深闺的习俗。

普林斯顿公开课 - 人性课程节选

Controllers on the ground joked that the flight had gone so well they did not have enough to do.

VOA: special.2009.07.22

That's a sign to me that we're not there yet and we have a lot more to do in finance.

很明显，我们并没达到那个边界,这说明我们在金融领域还有很多事情要做。

耶鲁公开课 - 金融市场课程节选

So the first challenge is, how do we reach all the women who do not have access to a prevention program?"

VOA: special.2009.07.29

Usually when you know why it's not working, it's obvious what you have to do to make it work.

通常你明白了出错的原因后，很明显你必须让程序正常运行起来。

麻省理工公开课 - 计算机科学及编程导论课程节选

This means you should not risk losing something you have by trying to get more of something you do not have.

VOA: special.2010.06.13

They have nothing to do with each other, they do not have a community, and they do not have a society.

他们互无往来,没有集体,没有社会

耶鲁公开课 - 古希腊历史简介课程节选

Netflix members do not have to go to the video store to get movies or to return them.

VOA: special.2009.09.25

We not only have a right to our lives but to do whatever we regard as needful to protect our lives.

这种权利不仅适用于我们的生活,还适用于我们所认为的一切可以,维护生活所需的行为。

耶鲁公开课 - 政治哲学导论课程节选

And since they do not have enough money to hire people, the work will simply not be done."

VOA: special.2010.04.13

And for Americans, all our democratic experience and do I have to put a tie on for this event or not?

美国人也如此,我们都参与民主政治,知道在什么场合需要系领带,比如现在

耶鲁公开课 - 美国内战与重建课程节选

Maybe even lots of snow. If you do not have to drive in it or remove it, snow can be very beautiful.

VOA: special.2009.01.26

So in oxygen we have a similar situation where, in fact, we are not going to promote any of the electrons because we have two lone pair electrons no matter what we do.

在氧中，情况很类似，我们不能激发电子,因为无论如何我们都有两个孤对电子。

麻省理工公开课 - 化学原理课程节选

Many parents do not have the money to buy books, so sometimes the teachers pay for them.

VOA: special.2009.08.24

So, if we want to get more magnesium into the marketplace at an affordable price, not by government edict, what do we have to do?

所以如果我们想把更多的镁,投诸市场，并让它保持在一个不太昂贵的价格，而且不靠政府法令，我们应该怎样做？

麻省理工公开课 - 固态化学导论课程节选

He said they would provide security and stability to people who have insurance, and make it possible to insure millions who do not.

VOA: special.2009.09.12

If the really crucial question is not Do I survive, but Do I have what I wanted when I wanted to survive?

如果关键的问题不是我是否存活，而是我存活时是否有我需要的东西？

耶鲁公开课 - 死亡课程节选

And when someone tells you that the cards are stacked against you, he is saying you do not have a chance to succeed.

VOA: special.2009.11.22

This is not to say that what is going at Harvard with numerous resources that we do have here is not important.

这并不是说哈佛现在,正投入大量资源的方面不重要。

哈佛公开课 - 幸福课课程节选

Girls from poor families can miss up to a week of school each month because they do not have enough money for supplies.

VOA: special.2009.03.16

I have some very funny stories about those, but now is not the time to do that, especially because we're being filmed.

关于这个我有点好段子,不过现在还不能说,尤其现在有人给咱录着呢

耶鲁公开课 - 1871年后的法国课程节选

Unlike blogs, Twitter users do not have to log onto the Web site to post updates.

VOA: special.2009.02.06

But what seems likely is the sort of phobias you're likely to have does not have much to do with your personal history but rather it has a lot to do with your evolutionary history.

但你可能患有的恐怖症,似乎与你的个人经历无关,而与人类进化史有着很大的关系。

耶鲁公开课 - 心理学导论课程节选

Tanya Pinto says you do not have to be wealthy or well known to help others.

VOA: special.2009.08.10

We're not going to have time to do them in this course, but if you take a class in the Political Science department on voting and on elections, on modeling elections, you will see that both of these have been modeled and discussed in great detail.

我们在这门课上就不去探讨它们了,但是如果你们选修了政治学专业的,有关投票与选举模型的课程的话,你们会发现这两个因素都可以模型化,而且都会有非常详细的介绍

耶鲁公开课 - 博弈论课程节选

We want a relationship in p-V space, not in T-V space. So we're going to have to do something about that. But first, it turns out that now we have this R over Cv.

我们想要p-V空间中的结果，而不是T-V空间中的,因此需要做一些变换，先来看现在的关系，它跟R/Cv有关。

麻省理工公开课 - 热力学与动力学课程节选