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,when we interpret the claim everyone dies alone, that just ends up being a slightly pretentious way of saying everyone dies, we might say,oh yeah,that is true and it is a necessary truth, but it's not especially surprising.

如果我们对每个人都孤独而死的诠释，只是装模作样地说明人终有一死，那我们会说，这是真理，也是必要的，但并没有什么好惊奇的。

耶鲁公开课 - 死亡课程节选

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

Each of these waves is regarded as in some way necessary for the proper construction of a just city.

每一波,在某些程度上,都被视为是真正建立正义之城的必需条件。

耶鲁公开课 - 政治哲学导论课程节选

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

Their relationship is necessary but, as we'll see in a minute, arbitrary, and each sign is like that.

这种关系十分必要，但是它又有任意性。

耶鲁公开课 - 文学理论导论课程节选

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

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

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

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

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

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

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

Well, I think that if the great majority of people try to derive maximum utility out of a service, like using cell phones and the convenience that cell phones provide, that sacrifice is necessary for satisfaction to occur.

我觉得如果绝大多数人想要,从某项服务中获得最大功利，比如使用手机，享受手机所带来的便利，那么为了满足需求，这种牺牲就是必要的。

耶鲁公开课 - 公正课程节选

Mr.Stevens says a one hundred percent increase in fish farming over ten years is necessary to keep providing for people at the current level.

VOA: special.2011.02.08

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

This is necessary so that the walls of a building will not shrink or break.

VOA: special.2009.01.12

That is to say a certain diversity is necessary to make up a city.

也就是说,某些差异是组成城市所必备。

耶鲁公开课 - 政治哲学导论课程节选

This is how the method works: Congress considers a bill the president believes is necessary.

VOA: special.2010.03.11

The philosopher Spinoza thought that ... if we could only recognize the fact, what he at least took to be the fact, that everything that happens in life is necessary, then we'd get a kind of emotional distance from it; it would no longer upset us.

哲学家Spinoza认为,如果我们能够认识到这个事实，至少他认为这是事实，即生活中的一切事情都是必然的，那么它对我们的情绪影响就比较少;,它不会再让我们感到痛苦。

耶鲁公开课 - 死亡课程节选

Research in a small space is necessary for the clouded leopard.

VOA: special.2010.06.22

So far Plato believes, is a passionate or spirited aspect of nature remains strong so long will be necessary to educate the warriors of society who defend it.

到目前为止,柏拉图相信，如果激情或意志层面的人性,维持强烈的话,就必需,教育保卫社会的战士。

耶鲁公开课 - 政治哲学导论课程节选

"What is necessary in this case is a collective effort, not only by the researchers and the people on the ground, but also the donor community, because controlling those two diseases can go a long way in improving people's food security and livelihoods in Sub-Saharan Africa."

VOA: special.2009.09.21

"We will do what is necessary to pass a health care bill to improve quality,lower cost and make America healthier,"

VOA: standard.2010.03.18

And facing a skeptical public, the British leader reiterated his contention that fighting in Afghanistan is necessary to keep Britain safe.

VOA: standard.2009.07.27

"Perhaps if we had a Pax, we could refocus on what is really important: the relationship,the love, being kinder than necessary.

VOA: standard.2010.05.18

He said a lot of misinformation is being spread by critics of reform, adding that it is necessary to clear the air.

VOA: standard.2009.08.11

He says he believes it is necessary to let North Korea know having nuclear programs will prove to be a bigger disadvantage than not having them.

VOA: standard.2009.05.26

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