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发表于:2018-12-01 / 阅读(119) / 评论(0) 分类 用Mp3背六级单词

Every fall, you need a new flu shot. Thats because todays vaccines train your immune system to recognize specific strains of flu, indentified by two proteins on the viruss coat, / and /. Thats where the H and N come from in H1N1. Problem is those pro

发表于:2018-12-02 / 阅读(97) / 评论(0) 分类 Scientific American(十二)月

应用生物学 Applied Biology 医学技术 Medical Technology 细胞生物学 Cell Biology 医学 Medicine 生物学 Biology 护理麻醉学 Nurse Anesthesia 进化生物学 Evolutionary Biology 口腔

发表于:2018-12-08 / 阅读(59) / 评论(0) 分类 医务英语

This is Scientific American-Sixty Seconds Science. I'm Chris *. Got a minute? I'm guessing you brush twice a day, or aspire to. Our ancestors were a little less diligent. But that's a good thing for scientists, because ancient placode teeth are like

发表于:2018-12-24 / 阅读(58) / 评论(0) 分类 2014年Scientific American(二)月

Exercise is good for you. Antioxidants are good for you. But put them together and its not as good as youd think. Because a recent study shows that some vitamins block the beneficial effects of exercise. A good workout not only gets your heart pumpi

发表于:2019-01-02 / 阅读(111) / 评论(0) 分类 60秒科学

Water Blankets Forming Planets A study in the journal Science finds much more molecular water in regions where planets are forming around young stars. The mechanism to keep the water from being destroyed by UV radiation appears to involve some of the

发表于:2019-01-02 / 阅读(141) / 评论(0) 分类 60秒科学

The work of these scientists is at last throwing a spotlight onto the mysterious hidden world of epigenetics. They appear to show that the lives of our ancestors have a capacity to affect us directly.

发表于:2019-01-02 / 阅读(82) / 评论(0) 分类 基因外遗传现象

Americans, Briton Win Nobel Chemistry Prize for Directed Evolution Two Americans and one Briton have won the 2018 Nobel Prize for Chemistry for developing new processes used to create drugs, chemicals and biofuels. Frances Arnold of the California In

发表于:2019-01-03 / 阅读(76) / 评论(0) 分类 2018年VOA慢速英语(十)月

GM Food Opponent Becomes Biotech Supporter 转基因食品反对者转为支持者 WASHINGTON By Abigail Martin Genetically modified organisms, or GMOs, have been the cause of much controversy in recent years. Numerous environmental groups say these

发表于:2019-01-03 / 阅读(111) / 评论(0) 分类 VOA常速英语2013年(八月)

Simulated Disasters Provide Earthquake Data The Rock Mechanics Laboratory is one of several specialized labs at Lamont-Dohertys Division of Seismology, Geology and Tectonophysics, now studying the subterranean dynamics of earthquakes. Research profes

发表于:2019-01-13 / 阅读(97) / 评论(0) 分类 VOA标准英语2012年(一月)

NewTeststoQuicklyDiagnoseSleepingSickness New diagnostic tools are being tested that would quickly indicate whether a person has African sleeping sickness. Current methods of diagnosis are slow and cumbersome and delay life-saving treatment. Health o

发表于:2019-01-13 / 阅读(64) / 评论(0) 分类 VOA标准英语2011年(九月)

New Alzheimer's Research Raise Hope for Treatment, Cure Scientists working to unravel the mysteries of Alzheimer's disease are excited by two recent studies. Both provide important new insights on how the disease spreads through the brain. Guy Eakin

发表于:2019-01-14 / 阅读(90) / 评论(0) 分类 VOA标准英语2012年(二月)

DAVID GREENE, HOST: Cancer patients are increasingly having the DNA of their tumors analyzed in a quest for better treatment. This is a prime example of what's known as precision medicine. That's where medical decisions are driven by data. NPR health

发表于:2019-01-16 / 阅读(226) / 评论(0) 分类 2018年NPR美国国家公共电台1月

ROBERT SIEGEL, HOST: Adam Frank usually has his head in the sky. He's an astrophysicist. It's an occupational hazard. Right now, though, he is dazzled by the universe of green right here on Earth. ADAM FRANK, BYLINE: Now that we're well past the star

发表于:2019-01-17 / 阅读(49) / 评论(0) 分类 2017年NPR美国国家公共电台6月

Ancient Human DNA Found in Cave DirtDNA新途径 Fossilized skulls and skeletons found in European caves gave us our first glimpse of our ancient cousins, the Neandertals. And a finger bone, found in a Siberian cave, first indicated the existence of

发表于:2019-01-20 / 阅读(58) / 评论(0) 分类 2017年科学美国人(五)月

Even for NASA nebulae are too far away to visit, so they've built one of their own here on earth, 40 years ago scientists peered into the clouds of dust and gas created from the remains of stars, and to their surprise, found not just elements but org

发表于:2019-01-23 / 阅读(78) / 评论(0) 分类 探索与发现2015年

Nicotine Enhances Effects of Cocaine A new study from Columbia University highlights the role of tobacco in cocaine addiction. The research indicates that nicotine may be a key gateway drug in a biological as well as a social context. Dr. Amir Levine

发表于:2019-02-12 / 阅读(74) / 评论(0) 分类 VOA标准英语2011年(十一月)

Better Living through Evolution: Nobel Prize in Chemistry This years prize is harnessing the power of evolution. The Royal Swedish Academy of Sciences has decided to award the 2018 Nobel Prize in Chemistry with one half to Frances H. Arnold for the d

发表于:2019-02-14 / 阅读(57) / 评论(0) 分类 2018年科学美国人10月

地点:中央公园咖啡馆 人物:莫妮卡,钱德勒,罗斯,乔伊,伊丽莎白 事件:罗斯和伊丽莎白转为地下情,朋友们开罗斯的玩笑,调侃伊丽莎白的年纪。 Elizabeth: Oops! I did not mean to run into yo

发表于:2019-02-16 / 阅读(48) / 评论(0) 分类 英语PK台

Did you ever wonder why sugar dissolves in a cup of coffee? Why not have the sugar just float in the middle of the cup, without dissipating into the coffee? Its because of the way water molecules interact with molecules in other substances. A water m

发表于:2019-03-06 / 阅读(122) / 评论(0) 分类 英语时差8,16