The coral whitens when it becomes stressed by warmer temperatures and expels the algae organisms it needs to survive.

VOA: special.2009.04.22

She needs to know this enzyme works by both acid base chemistry, and oxidation reduction.

她要知道酶催化，她需要知道这种酶,在酸碱环境下的反应和氧化还原反应。

麻省理工公开课 - 化学原理课程节选

This needs to be complete by the end of today.

这需要在今天之内做完。

I don't know 课堂 - SpeakingMax英语口语达人

He also says parents can help create a healthy emotional life for small children by being watchful and responsive to their needs.

VOA: special.2011.08.10

Now, daily values are established by the government, how much nutrients the typical person needs and then how much--what percentage of that a food provides.

每日建议摄取量是由政府制定的,代表普通人的日营养需求量,这里给出了该食物所能提供的百分比

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

His simple needs were supplied by selling or trading the skins of wild animals in the town.

VOA: special.2009.10.31

The new prince, as we've seen, must know how to use religion but needs to learn how not to be used by religion, must not become a dupe of the religious.

正如我们所看到的，这种新型君主必须知道,如何去利用宗教而不是被宗教所利用,必须避免成为受宗教愚弄摆布的对象。

耶鲁公开课 - 政治哲学导论课程节选

"A secret inquiry conducted by a clutch of grandees, handpicked by the prime minister is not what Britain needs.

VOA: standard.2009.06.15

That is a new part of India's economy, and to the extent that by globalization, one needs more foreign investment and increased connection to foreign trade they are playing a role but India's economy growth is largely being driven by internal investments.

那也是印度经济,新的组成部分，从某种层面来说，由于全球化，经济发展需要,吸引更多外资，促进外贸,这些因素确实起了作用,但印度经济增长大部分还是靠,国内投资。

普林斯顿公开课 - 国际座谈会课程节选

Proposals to sanction Iran's gasoline imports, which account for 40 percent of its needs, have been advocated by various lawmakers in recent years.

VOA: standard.2009.04.28

It occurs because blood flow gets reduced in that blood vessel and so the heart muscle, which is actively beating all the time, needs large quantities of oxygen provided by blood can't get the blood through the vessel.

发病原因是冠状动脉血流量降低,因为心肌搏动永不停歇,随时需要血液供给大量氧气,发病时血液无法正常流过血管

耶鲁公开课 - 生物医学工程探索课程节选

Doronila says Mr.Aquino needs to live up to his own strong anti-corruption message, by prosecuting past abuse.

VOA: standard.2010.06.30

And so it's an understandable ploy on Milton's part that he needs to vilify Shakespeare by identifying that great poet, his older contemporary, with Comus.

所以就弥尔顿而言，是一个可理解的事,他需要通过认同那伟大的诗句来贬低莎士比亚，用Comus来压倒比他年纪较大的同时代人。

耶鲁公开课 - 弥尔顿课程节选

In a secret assessment published by The Washington Post Monday, General Stanley McChrystal says he needs more forces and,without them, the effort faces possible failure.

VOA: standard.2009.09.22

She says therapeutic feeding for severely malnourished children, water and sanitation, and education are some of the other needs that will be covered by the appeal.

VOA: standard.2009.06.21

"Our security needs would be greatly enhanced by a clear alternative to the kind of autocracy we have in Yemen and other parts of the Arab world."

VOA: standard.2010.05.19

"A sentence of 15 years imprisonment is not disproportionate to the crime and the needs of society so that an injustice would be done by imposing that sentence."

VOA: standard.2010.08.03

I'm just disappointed by my country. It really needs to stand up,".

VOA: standard.2009.11.27

The International Organization for Migration says shelter, food and employment remain the most pressing needs of most of the more than 1.5 million people displaced by the bombing.

VOA: standard.2009.09.20

But the Uruguayan leader, a doctor by training,lamented that Latin American governments are devoting growing resources to armaments rather than dealing with pressing social needs including health and education.

VOA: standard.2009.09.15

But she said that if Hamas wants to play a part in peace talks, it needs to meet international terms by renouncing violence and accepting Israel's right to exist.

VOA: standard.2010.03.16

This is our government. It is a government of the people, by the people and for the people, and the by the people piece needs to get back into it."

VOA: standard.2009.07.31

"Croatia,who started the negotiation process the same day as Turkey, will probably will be ready by the end of 2010 whereas Turkey needs over 10 years to be ready at this pace.

VOA: standard.2009.10.15

" Senator Lugar, who is on the Foreign Relations Committee in the Senate in the United States, has said in order for that to happen, the new agreement needs to be done by August.

VOA: standard.2009.04.08

adaptations,coastal protections Among a host of necessary need to be built, crops threatened by drought need to be modified, health care needs to be stepped up, and new clean energy solutions need to put in place.

VOA: standard.2009.12.11

And we want to get the world's attention focused where we think it needs to be, with these continuing efforts by al Qaida and others to get just enough nuclear material to cause terrible havoc, destruction and loss of life."

VOA: standard.2010.04.11

Rural areas are largely untapped. "So the government needs to work hard to diversify its export commodities, export products, add more value by processing more, let's say agriculture production in the country and thereby create more jobs to help the economy grow faster."

VOA: standard.2010.06.02

The economy needs help. But rather than stimulating the economy by providing an improved incentives to work and invest, we have been devoting trillions of dollars in taxpayer money to expanding and creating permanent long-term government spending programs and income-redistribution mechanisms,".

VOA: standard.2009.04.03

But I think Iran needs to do a much better job of respecting Iraq's sovereignty and they should start by ceasing to provide weaponry to various extremist groups in Iraq" Looking ahead to parliamentary elections in Iraq in January, Georgia Democrat David Scott and Ambassador Hill had this exchange about the question of a possible referendum on the U.S.military presence in Iraq.

VOA: standard.2009.09.10