He felt he had to make citizens understand why such laws were necessary.

VOA: special.2009.10.29

And what we saw last time is that this was necessary to make things work, this part of it in particular.

上节课我们讲,这是对外做功的必要条件，特别是这个部分。

麻省理工公开课 - 热力学与动力学课程节选

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

"The blunt reality is that there will be dwindling appetite and patience in the US Congress -- and in the American body politic writ large -- to expend increasingly precious funds on behalf of nations that are apparently unwilling to devote the necessary resources or make the necessary changes to be serious and capable partners in their own defense."

VOA: special.2011.06.11

Why is it necessary to rend something, to make it soul or whole? Is it necessary?

为什么要撕破某样东西，它才能完美呢，这有必要吗？

耶鲁公开课 - 现代诗歌课程节选

"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

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

He says only by engaging China can Indonesia's economy make the changes necessary to compete in the global economy.

VOA: standard.2010.05.13

Because they've made many copies of their genome and they've made all the proteins that are necessary to - for assembly of a new virus, then this cell can make many new viruses.

因为病毒制造了大量病毒基因组的拷贝,和所有,新病毒组装所需的蛋白质,所以这个细胞就有能力制造大量新的病毒

耶鲁公开课 - 生物医学工程探索课程节选

Mr.Obama says it is necessary to end taxpayer bailouts of private companies and make financial deals more transparent.

VOA: standard.2010.04.24

Secretary Gates says President Obama has pledged to give all the time necessary to allow the commanders to make their case, before he decides.

VOA: standard.2009.10.06

banks and disrupted normal lending. Speaking at a financial conference sponsored by The Wall Street Journal newspaper, Geithner said the government will provide all of the money that is necessary to make the program work.

VOA: standard.2009.03.24

If the so called "double dip" scenario happens,in which the economy starts to shrink again, Baily says it would make a strong case for a second stimulus something the Obama administration hopes will not be necessary.

VOA: standard.2009.12.20

Their task is to find common ground, including on reduction of greenhouse gas emissions, promotion and transfer of new more eco-friendly technology and the necessary funding to make this possible, especially for the less developed and poorer nations.

VOA: standard.2009.12.08

"Iraq's future is in the hands of its own people, and Iraq's leaders must now make some hard choices necessary to resolve key political questions, to advance opportunity and to provide security for their towns and their cities,"

VOA: standard.2009.06.30

"If in the future, banks need exceptional assistance in order to get through this, then we will make sure that assistance comes with conditions, not just to protect the taxpayer, but to make sure this is the kind of restructuring necessary for them to emerge stronger.

VOA: standard.2009.04.05

"And we will have to take action in London to make sure that the banking system is reformed, to ensure ourselves that our financial institutions can come to the aid of the poorest countries, and to make sure that we do what is necessary to ensure that there is strong growth and recovery - and particularly jobs in the world economy as a result of the actions that we take,".

VOA: standard.2009.03.25