标签：immunity 相关文章
Avian Flu Poses Ominous Threat to World, says US Health Official 美国卫生部称禽流感对世界造成威胁 A top U.S. health official says the country is preparing for the possibility of a dead
VOA2005（上）--环境科学探索
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背诵为王第四册
Sneezing, coughing, and sniffing. Welcome to winter and the common cold virus, a cure for which has eluded for years. But now a major breakthrough by scientists in Cambridge University brings that cure a step closer, as they've discovered a new way t
万花筒2010年
Why are these people subjecting themselves to this crazy exercise? They're building their emotional endurance because they desperately long for a chance at this-She bangs, she bangs-possible superstar among American Idol. I mean ever think about it,
访谈录2008
By Melinda Smith Washington 24 March 2008 Scientists who have worked for decades to find a vaccine for the HIV and AIDS infections will meet next week at the U.S. National Institute of Health in Bethesda, Maryland to chart a future course for researc
VOA标准英语2008年（三月）
Libya's Former Rebels Pose Challenge A year and a half ago, electrical engineer Omran Al-Awayeb took up arms to defend his neighborhood against Gadhafi forces. Now he commands a part-time band of rebels who are still worried about their country's fut
VOA标准英语2012年(七月)
Better Treatment for HIV-Positive Pregnant Women The World Health Organization recently issued new guidelines to prevent mother-to-child transmission of HIV. The recommendations include getting more women on treatment sooner and staying on it for lif
VOA标准英语2012年(四月)
Research Group Has High Hopes for New TB Vaccine Physicians have long known that the so-called BCG vaccine for tuberculosis does not provide the same level of protection against the disease in all parts of the world. Some also say the vaccine's effec
VOA标准英语2011年(九月)
By Selah Hennessy Dakar 07 June 2007 Former governors in Nigeria suspected of corruption have showed up in Abuja for a meeting with an anti-corruption body, but several others are on the run. The government of new President Umaru Yar'Adua has vowed t
2007年VOA标准英语（六月）
By Peter Fedynsky Kyiv 03 October 2007 With less than half a percent of ballots still uncounted in Ukraine's special parliamentary election, President Viktor Yushchenko has called for the country's three leading parties to begin coalition talks. But
2007年VOA常速英语（十月）
The AIDS epidemic offers an example. The broad goal, of course, is to end the disease. The highest-leverage approach is prevention. The ideal technology would be a vaccine that gives lifetime immunity with a single dose. So governments, drug companie
偶像励志英语演讲
The first American citizen has died from the swine influenza A-H1NI virus known as swine flu, and the number of confirmed cases in the United States has surged to 642. The victim was a 33-year-old woman from Texas who officials say had other chronic
VOA双语新闻 2009年5月
Microbes play a huge role in our nutrition, our immunity, maybe even our mental health. But we arent the only ones that rely on these armies of resident bacteria. Baby cockroaches, the ones that just emerge from the egg, don't have any gut bacteria.
2017年Scientific American(三)月
By Deborah Tate Capitol Hill 10 October 2007 Two U.S. congressional panels have approved legislation that would restrict the government's power to eavesdrop on foreign terrorism suspects. President Bush expressed his opposition to the measure, saying
2007年VOA常速英语（十月）
By Peter Fedynsky Moscow 18 September 2007 Russia's ultra-nationalist Liberal Democratic Party has confirmed Andrei Lugovoi, a man wanted for murder in Britain, to be one its candidates for upcoming elections to the Russian Parliament. Lugovoi is a
2007年VOA标准英语（九月）
By Gilbert da Costa Abuja 05 September 2006 Nigeria's anti-graft agency has vowed to press on with corruption investigations in the northern state of Zamfara, despite a recent attack on a government office involved in a fraud probe. The anti-corrupt
2006年VOA标准英语（九月）
By Peter Fedynsky Moscow 04 September 2007 The Ukrainian parliament has convened, despite a presidential warning that the fall legislative session is illegitimate. VOA Moscow Correspondent Peter Fedynsky reports the issue involves larger constitution
2007年VOA标准英语（九月）
On the eve of the International AIDS Conference, which begins in Mexico City Sunday, researchers at the University of Texas Medical School at Houston claim to have discovered a way to destroy the HIV virus that causes AIDS. If their hopes are confir
VOA标准英语2008年（八月）
US Iraq Withdrawal May Tempt Iran to Fill Void The Obama administrations decision to pull all U.S. troops out of Iraq by the end of this year could tempt Iran to try extending its influence there, analysts say, triggering increased tensions with Saud
VOA标准英语2011年(十一月)
台湾籍旅美老师今天交给我们的句子是： Factors like the cancer cell's properties, and the effectiveness of the immune system in eliminating the cancer cells, also play a role in determining the success of metastasis. 影响的因素诸如
留美老师带你每日说英文