外突变；因细胞核基因引起色素体的突变

VOA慢速英语2011--American History: Roosevelt Wins in 1936

MARIO RITTER: Welcome to THE MAKING OF A NATION American history in VOA Special English. Franklin Roosevelt's New Deal policies during the nineteen thirties changed the face of American government. The new president and the Congress passed legislatio

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2011年VOA慢速英语(三)月

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Mummies Contain Clues to Colon Cancer 木乃伊包含了结肠癌的线索 From VOA Learning English, this is the Health and Lifestyle report. Colon cancer is linked with obesity, lack of exercise, and a poor diet high in processed foods. However, sc

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2016年VOA慢速英语(三)月

VOA常速英语2016--糖尿病患者或见新希望？NMN蛋白质

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VOA标准英语2016年(七月)

TED演讲:和老年痴呆症说再见(5)

Even before scientists sort this out, this information is actually really good news for us, 即使科学家还尚未解决问题，这一好消息确实振奋人心， because it turns out that the way we live can influence the accumulation of amyloi

发表于:2018-12-18 / 阅读(147) / 评论(0)

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SSS 2008-05-28

This Scientific Americans 60-Second Science. I am Karen Hopkin. This will just take a minute. They say that older folks benefit from spending time with young people. And thats not just an excuse to stick grandma at the kids table at Thanksgiving. Now

发表于:2018-12-24 / 阅读(150) / 评论(0)

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Short Conversation 接待办理 A:Good morning.I am here to pick up a badge.I have already registered online. B:May I have your name or confirmation number? A:I have a confirmation e-mail here. B:Okay,Mr. Kazuo Imai,everything looks good.Let me print

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名人轶事:Barbara Jordan, 1936-1996: A Powerful Voice

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发表于:2019-01-01 / 阅读(146) / 评论(0)

名人轶事

SSS 2008-05-20

This is scientific American's 60-Second Science, I'm Karen Hopkin, this'll just take a minute. If theres anything better than a fresh, ripe, tomato, its a gigantic fresh, ripe tomato. And thanks to a couple of mutations, thats exactly what we all enj

发表于:2019-01-08 / 阅读(178) / 评论(0)

Scientific American(五)月

SSS 2008-06-13

This is Scientific American's 60-Second Science, I'm Cynthia Graber. This'll just take a minute. If evolution weeds out detrimental traits, why do some seem to stick around? Well what's bad in our current environment may have been good in the conditi

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Scientific American(六)月

Gene Mutation Linked to Type 2 Diabetes

Scientists have identified a unique genetic mutation in about 10 percent of people with type 2 diabetes(糖尿病) studied in the United States and Europe. The discovery could help some people learn if they are at risk of developing diabetes so they

发表于:2019-01-11 / 阅读(223) / 评论(0)

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VOA慢速英语 2008 0513b

SCIENCE IN THE NEWS - Museum Aims to Keep African Archeological Treasures in Africa Also: A vaccine against meningitis proves successful in Uganda. And a study suggests genetic reasons for living longer. Transcript of radio broadcast: 12 May 2008 VO

发表于:2019-01-11 / 阅读(145) / 评论(0)

VOA慢速英语2008年（五）月

VOA慢速英语2010-People in America - Lucille Clifton, 1936

I'm Steve Ember. BARBARA KLEIN: And I'm Barbara Klein with People in America in VOA Special English. Today we tell about the award-winning poet and writer Lucille Clifton. Critics call her one of the greatest writers of our time. (MUSIC) STEVE EMBER:

发表于:2019-01-12 / 阅读(174) / 评论(0)

2010年VOA慢速英语(四)月

VOA慢速英语2010年-PEOPLE IN AMERICA - Roger Miller, 1936

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2010年VOA慢速英语(十)月

VOA标准英语2011--Natural Substance Reverses Diabetes in M

Natural Substance Reverses Diabetes in Mice Researchers used a substance, made naturally in the body, to reverse diabetes in mice, a finding which could be key to rolling back Type 2 diabetes. The enzyme, called NMN (nicotinamide mononucleotide), res

发表于:2019-01-19 / 阅读(135) / 评论(0)

VOA标准英语2011年(十月)

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发表于:2019-01-26 / 阅读(196) / 评论(0)

经济学人科技系列

THE MAKING OF A NATION 182 - Election of 1936

THE MAKING OF A NATION - February 28, 2002: Election of 1936 By David Jarmul THE MAKING OF A NATION -- a program in Special English by the Voice of America. (Theme) Franklin Roosevelt's New Deal polic

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The Making of a Nation

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发表于:2019-02-21 / 阅读(218) / 评论(0)

人物杂志

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发表于:2019-02-21 / 阅读(215) / 评论(0)

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Agnostida

alkali lye

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awake to the fact that

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