标签：Cloning Humans 相关文章
46.Vision Human vision like that of other primates has evolved in an arboreal environment. In the dense complex world of a tropical forest, it is more important to see well that to develop an acute sense of smell. In the course of evolution members
新概念优美背诵短文50篇
长篇阅读题型介绍 自2013年12月起，原快速阅读调整为长篇阅读。篇章后附有10个句子，每句一题。每句所含的信息出自篇章的某一段落，要求考生找出与每句所含信息相匹配的段落。有的段落
闭着眼睛飘单词 六级词汇
长篇阅读题型介绍 自2013年12月起，原快速阅读调整为长篇阅读。篇章后附有10个句子，每句一题。每句所含的信息出自篇章的某一段落，要求考生找出与每句所含信息相匹配的段落。有的段落
闭着眼睛飘单词 六级词汇
Scientists from a South African university have found evidence of a population of what they say were small-bodied modern humans on an island of Palau, east of the Philippines. Lee Berger has spent his professional life searching for evidence of mank
国家地理2008年
Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文，请发贴到 听力原文收集区 ，您将会获得 10 到 30 积分的奖励 ! Thank you ！
星际动物园.The.Star.Zoo
The tiny brain of this zebra finch may help scientists answer questions on how people form words to talk. Like humans songbirds learn to vocalize by imitation. Were able to not only just study the mechanisms of how vocal learning works in these songb
VOA标准英语2018年(五月)
This is the VOA Special English Health Report. The next time you think about going without sleep, consider this: Laboratory animals that are kept awake for long periods of time ... die. Yet sleep scientist Ying-Hui Fu at the University of California
VOA慢速英语2009年（八）月
Gene Therapy Halts Vision Loss in Dogs Researchers have stopped vision decline in dogs with an inherited disease that causes blindness. The gene therapy technique they used may someday stop vision loss in humans. Retinitis pigmentosa (RP) is an eye d
VOA标准英语2012年(二月)
Head to the mountains, and if the steep trails don't slow you down, the thin air will. There's less oxygen up thereso strenuous activity can leave you dizzy, out of breathor worse. But even though you're beat, biochemical processes are already busy a
2017年Scientific American(二)月
When life gets rough 生活艰难时 Understand and be grateful for your fears 理解感激你的恐惧 Fear can be a great teacher. And overcoming fears can also make you feel victorious. For example, when I was in college, I feared public speaking
英语早间课堂
Without air, water and sunlight there would be no living things. Because they are so important, ecosystems try to be very careful with these valuable resourses. Human beings often throw away things they have used only once. In good ecosystems, resour
高中英语人教版第一册课本听力
This is the VOA Special English Agriculture Report. Dominette, a Hereford cow whose genetic material was used in the study Researchers from twenty-five countries have made a genetic map of a cow. Better understanding of what makes a cow a cow could
VOA慢速英语2009年（五）月
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）
Researchers went to the U.S. Capitol Thursday to plead for more funding so that a breast cancer vaccine could be tested on humans. The doctors from Cleveland Clinic in Ohio say their vaccine has prevented cancer in laboratory mice, but they are unabl
VOA标准英语2010年(七)月
In a three-day competition on the popular U.S. television quiz show Jeopardy, an IBM super computer named Watson faced off against two human contestants and won. The computer proved adept at trivia, on which the show is based. Watson was not stumped
VOA标准英语2011年(二月)
RACHEL MARTIN, HOST: Now to China, where a strain of bird flu has killed a record number of people this year. Scientists on the frontlines of this deadly strain are more worried than ever about its potential to spur a global pandemic. NPR's Rob Schmi
2017年NPR美国国家公共电台4月
Voice 1 Hello. Im Rachel Hobson. Voice 2 And Im Mike Procter. Welcome to Spotlight. This programme uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice 1 Deep in the Democ
环球英语 Spotlight
The Democratic Republic of Congo in Central Africa is where we start todays show. Whats happening there is alarming medical officials around the world. The latest outbreak of the deadly Ebola virus has spread to a large city. 我们今天的节目从非
CNN美国有线新闻2018年5月
One an old route humans took when they first migrated from Africa into Europe seems that they might have marched the path. Not like constant grettle who consciously left bright chromes, ancient humans ate as they tracked and they are appeared to have
2015年Scientific American(六)月
By Nick Wadhams Nairobi 31 October 2007 At a Nairobi-based orphanage for baby elephants, the animals are seen as lovable beasts in desperate need of protection. But across Kenya, adult elephants are better known as overgrown garden pests that trample
2007年VOA常速英语（十月）