单词：v-gene reactivation(streisinger 1956)
单词：v-gene reactivation(streisinger 1956) 相关文章
Don: Some people seem to need significantly less sleep than others. Yael: Tell me about it. I have a friend who swears that she sleeps only five hours a night. If she's telling the truth, then she must be bionic. She seems to have plenty of energy, a
英语听力文摘 English Digest
In this Moment of Science Yael and Don discuss how women can see more color. Yael: Not only are eight percent of men colorblind, but even compared to men who can distinguish between reds and greens, many women may live a more colorful existence. That
英语听力文摘 English Digest
SCIENCE IN THE NEWS -February 5, 2002: Digest VOICE ONE: This is Sarah Long. VOICE TWO: And this is Bob Doughty with Science in the News, a VOA Special English program about recent developments in sci
科技之光
By Nancy Steinbach Broadcast: October 1, 2003 This is Faith Lapidus with the VOA Special English Health Report. Scientists in Iceland say they have identified the first gene linked to common forms of
VOA2003（下）-环境与健康
What Is Progeria? Progeria was first described in the nineteenth century. The mysterious disease is often thought of as premature aging. Children with progeria are normal for their first year of life, but then develop medical problems normally seen i
英语听力文摘 English Digest
Glow In The Dark Cats, Monkeys, And HIV Have you heard the one about the jellyfish, the monkey, and the glow in the dark cat? Actually, its no joke: scientists are experimenting with ways to combat HIV and AIDS by injecting cats with genes taken from
英语听力文摘 English Digest
How Neanderthals Fought Disease Every year people are encouraged to get their annual flu shots. Signs are posted at drug stores and clinics. Get your shots here. Modern preventive medicine has saved millions of lives. But you may be surprised to hear
英语听力文摘 English Digest
By Robert Raffaele Washington 29 April 2008 For the first time, scientists have used gene therapy to dramatically improve sight in people with a rare, inherited form ofblindness. Researchers in Philadelphia and London are calling the results a milest
VOA常速英语2008年（四月）
By Barry Wood Washington, DC 18 October 2006 watch Hungarian Revolt report Fifty years ago, on October 23, 1956, Hungarians rose up against their communist rulers and for two precious weeks lived in relative freedom, until their revolution was bruta
2006年VOA标准英语（十月）
By Stefan Bos Budapest 23 October 2006 Street riots and anti-government demonstrations have overshadowed the 50th anniversary of Hungary's 1956 Revolution against Soviet rule. The arrival of presidents, prime ministers and royals from different coun
2006年VOA标准英语（十月）
Tunisian Americans Celebrate First Free Elections Since 1956 Tunisians voted Sunday in what many are calling the political rebirth of the country. The Ennahdha party, a moderate Islamist group, looked set to win the most seats in early counting. Tuni
VOA标准英语2011年(十月)
a butterfly with glowing eyes Believe it or not, Monteiro and her team insert ed a new gene into the butterflys genetic sequenceone taken from a jellyfish . No, I know you're fooling. Actually I'm not. This gene codes for a green florescent protein t
英语听力文摘 English Digest
About six or seven million years ago chimpanzees and humans evolved from a common primate ancestor. Chimps went on to become the relatively small-brained, forest dwelling creatures we know and love. Humans went on to evolve large brains, spread throu
英语听力文摘 English Digest
By Stefan Bos Budapest 04 November 2007 Hungarians remembered Sunday those who died when troops from the Soviet Union crushed the 1956 Hungarian Revolution against Soviet domination and Communism. But as Stefan Bos reports from Budapest, this year's
VOA常速英语2007年（十一月）
The Smell of Dirt A lot of people love that fresh-dirt smell. The surprising thing, though, is that it isnt coming from the dirt itself. Microbiologist s have traced the pleasant odor to an organic chemical called geosmin. No way! But how does geosmi
英语听力文摘 English Digest
Mind Reading 读心术 Sometimes we get letters here asking whether psychic s are for real. Well, despite the t.v. shows, there isnt any scientific evidence that psychic powers, such as mind-reading, actually exist. That doesnt prove they dont existj
英语听力文摘 English Digest
It Pays to Be an Optimist 做个乐观主义者 Research shows that whether a person is an optimist or a pessimist is related to their quality of life, including their physical health. The subjects involved first took personality tests in the 1960s a
英语听力文摘 English Digest
Toxin-loving Trees 树木能调节气候,保持生态平衡，树木通过光合作用，吸进二氧化碳,吐出氧气,使空气清洁，新鲜。一亩树林放出的氧气够65人呼吸一辈子。树还能防风固沙，涵养水土,吸收各种粉
英语听力文摘 English Digest
Why Clones Arent Copies 克隆是英文clone或cloning的音译，而英文clone则起源于希腊文Klone，原意是指以幼苗或嫩枝插条，以无性繁殖或营养繁殖的方式培育植物，如扦插和嫁接。在大陆译为无性繁殖在
英语听力文摘 English Digest
Fatherless Honeybee s How male honeybee s can be without fathers? The reason lies in whats called a haploidiploid system of sex determination. Approximate ly one-fifth of the animal kingdom, including ants and wasp s , use this system. What it boils
英语听力文摘 English Digest