They believed that it was a necessary evil.

VOA: special.2011.04.07

Some would get worried and they would discuss slavery as a necessary evil this system entailed upon them.

有些人感到忧虑,他们认为传承下来的奴隶制,毫无疑问是种罪恶

耶鲁公开课 - 美国内战与重建课程节选

We're going to get a deep insight if it's a necessary truth about death that everyone dies alone.

如果这是对死亡来说必不可少的真理,那我们能得到一些深刻理解。

耶鲁公开课 - 死亡课程节选

In his weekly address Saturday, President Obama says reforming the financial system is a necessary part of the country's economic recovery.

VOA: standard.2010.04.24

We don't have an enormous difficulty grasping them, and it doesn't seem to me that our capability of grasping irony is founded on a necessary, underlying agreement.

我们在理解时不会用很大困难，而且我认为，我们理解讽刺的能力,是建立在必要的，潜在的共识之上的。

耶鲁公开课 - 文学理论导论课程节选

Federal health minister,Nicola Roxon, says forcing the vessel to cancel a planned 10-day trip around the Great Barrier Reef is a necessary precaution.

VOA: standard.2009.05.30

There is a necessary and inevitable tension between philosophy and belief or to put it another way between philosophy and the civic pieties that hold the city together.

所以紧张关系必然,且无可避免地存在于哲学与信念之间,或换句话说,介于哲学与维系全城的公民虔诚间。

耶鲁公开课 - 政治哲学导论课程节选

If that is what it takes to bring JAL back, he must convince employees that it is a necessary step for the company's future success.

VOA: standard.2010.02.01

We've extrapolated that people have property rights and so whether or not it would be a good thing or a nice thing or even a necessary thing for the survival of some people, we don't see that that justifies the violation of the right that we've logically extrapolated.

我们已经推出人们有财产权,所以，就算是为了做好事，做善事,甚至是为了让某些人活下去而必须做的事，那也是不能证明，侵犯这些推定的权利,就是正当的。

耶鲁公开课 - 公正课程节选

But what the White House sees as a necessary,thoughtful process to arrive at the best-possible decision on an eight-year conflict is seen as dangerous "dithering" by Republican legislators.

VOA: standard.2009.11.23

The fact that I have this star here, this star here, this star here, is really just 'cause I'm a little anal and it looks pretty to make a little box out of everything but it's not strictly necessary.

事实上大家可以看到，这有颗星，这有颗星，这有颗星，其实是我手痒,这看起来像是用*围成个框，把它们包围起来,其实这是完全没有必要的。

哈佛公开课 - 计算机科学课程节选

Grayson says that while Felipe Calderon's campaign against the powerful drug lords is a necessary effort to protect the nation from criminal enterprises, it will not end narcotics trafficking.

VOA: standard.2009.06.09

Or just have the good intentions without the effort that's necessary to bring about a positive exponential function.

还是只有好的意图但不付出,必要的努力发挥正面指数函数的作用。

哈佛公开课 - 幸福课课程节选

That accord mandated by the U.S.Congress is a necessary prerequisite for American aerospace firms to bid on a pending Indian purchase of 126 multi-role fighter jets, potentially the largest-ever arms sale.

VOA: standard.2009.07.20

She speaks of the necessary unity of body and soul, which for her entails a defense of the body, defending, as she does, its knowledge and its goodness.

她说道身体心灵结合的必要性，这对她来说需要保卫其身体，为身体的知识与美好抗击。

耶鲁公开课 - 现代诗歌课程节选

I might say I touched all the bases if I did what is necessary to complete a job or activity.

VOA: special.2009.04.12

For him, and I quote him, "Fortune is a woman and it is necessary to hold her down and beat her, and fight with her."

他认为,"命运就是女人,必须控制并将她打倒在地,与其斗争"

耶鲁公开课 - 古希腊历史简介课程节选

It is always a good idea to keep a lot of necessary supplies in the home even before winter begins.

VOA: special.2010.01.05

A narrower array of foods is necessary for nutritional adequacy if people are eating meat.

如果是吃肉的人,只需要几种就足够营养了

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

But they also made it clear that they are willing to act alone, if necessary, to pass a health care bill.

VOA: special.2010.02.27

This is necessary, it's hard to find holes in a Nobel Prize worthy idea.

这是很必要的，在一个获得诺贝尔的想法中,很难发现漏洞。

麻省理工公开课 - 化学原理课程节选

She made sure there were a large number of workers to give the necessary attention to all the kids.

VOA: special.2009.08.23

Why don't bacteria need a distinct nucleus and that's necessary in a human cell?

为什么细菌不需要单独的细胞核,而对人类细胞则为必需

耶鲁公开课 - 生物医学工程探索课程节选

He said southern defenses around the fort were so strong that a major military effort would be necessary.

VOA: special.2009.08.06

Once that's clear, we will send it to the necessary application, be it a search engine or anti-virus software, or a stock search, or shopping, or FriendFinder - anything that can be plugged into this kind of platform.

结果一出,页面将会转到相应的应用，像，搜索引擎，或者，杀毒软件，或是，股票搜索，购物，交友网站,任何能够接入平台的东西。

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

If it is necessary to borrow some money to fix the car, you should look for a friend who is an "easy touch".

VOA: special.2009.06.07

This was a first order condition or a first order necessary condition.

这个只是一阶条件,是必要条件

耶鲁公开课 - 博弈论课程节选

But a recent study warned that more children than necessary are being exposed to radiation this way.

VOA: special.2009.10.28

So it's not just merely the case that in fact we are all going to die; it's a necessary truth that we're all going to die.

所以我们会死去,不仅是一个事实;,我们会死去还是必然的真理。

耶鲁公开课 - 死亡课程节选

Well,that does seem to be true and it seems to be a necessary truth.

这似乎是真的，而且似乎是个必要的真理。

耶鲁公开课 - 死亡课程节选