单词：genetic isolate population
单词：genetic isolate population 相关文章
Lesson 9 Is It a Good Idea to Control Population Growth in the World? Text What Overpopulation Feels Like We moved slowly through the city in a taxi and entered a crowded slum district. The temperatur
高级口语教程
Scientists have found living organisms trapped in crystals that could be 50,000 years old. The organisms were found in a hot, but beautiful cave system in Naica, Mexico. These ancient life forms can be seen only with a microscope. They are dormant, w
2017年VOA慢速英语(二)月
Mosquitoes spread malaria that kills an estimated 429,000 people every year. Many of them are children, so this new method of killing mosquito populations has sparked a huge interest. Scientists from Imperial College London managed to eliminate a pop
VOA标准英语2018年(十月)
Calfornia Foundation Announces $10 Million Genetics Prize The X Prize Foundation is offering a $10 million prize to the reseach team that excels at fast, accurate and cheap genetic sequencing. On Wednesday, the California-based organization, which us
VOA标准英语2011年(十月)
[00:01.84]3 Listen and complete. [00:06.70]What have the children done for their project [00:10.30]on population? [00:11.96]Listen and complete their sentences. [00:16.14] [01:04.64]4 Listen and complete. [01:08.78]Listen and fill in the missing info
外研社新标准初中英语九年级
Research into Population Genetics While not exactly a top selling book, The History and Geography of Human Genes is a remarkable collection of more than 50 years of research in population genetics. It stands as the most extensive survey to date on ho
新视野大学英语读写教程(4)
By Zulima Palacio Washington 16 October 2007 As the world's population grows, the need to ensure food safety from farms to fork has become a major international concern, with most of the attention focused on livestock. Producer Zulima Palacio talked
2007年VOA常速英语（十月）
DEVELOPMENT REPORT - World Population by 2050 By Jill Moss Broadcast: Monday, August 30, 2004 This is Gwen Outen with the VOA Special English Development Report. New research shows that Earth will hav
农业与发展
This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Why bother with sex? Its a question thats bugged biologists since they first noticed that some critters do it and some dont. The answer theyve come up wi
Scientific American(十一)月
Theres been an unexpected development in our understanding of drug resistance in bacteria. The accepted scenario was a simple case of evolutionary selection. In a bacterial population exposed to a killer drug, a few lucky individuals might have a gen
Scientific American(九)月
The United Nations is observing World Food Day (Saturday, Oct. 16). Food prices have been climbing in recent months because of bad weather in several major agricultural regions. Experts predict there will be more extreme weather as climate changes, j
VOA标准英语2010年(十)月
By Greg Flakus Houston, Texas 24 November 2006 watch DNA report Millions of people around the world can trace their ancestry back several generations or more through oral history, family documents or government records of such events as marriages an
2006年VOA标准英语（十一月)
New technologies aid in conservation efforts at the National Zoo Susan Logue Koster | Front Royal, Virginia 19 July 2010 The National Zoo opened a cheetah science facility in 2007 at its conservation center in Front Royal, VA. Cheetahs are considered
VOA标准英语2010年(七)月
A group of scientists has unveiled what they say is the most comprehensive study ever of African genes which they say gives new insight into the origins of humans. The genetic study, a compilation of two big studies, confirms theories that modern hu
VOA标准英语2009年(五月)
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
The worlds population is getting bigger and bigger. Theres a population explosion in some countries. Im not sure if this is good or bad. The Earth can only support a limited number of people. One day, the worlds population will be too big to feed eve
纯正英语一分钟
By Phil Mercer Sydney 01 April 2008 Researchers in Australia say a Tasmanian devil called Cedric could hold the key to the survival of the embattled species. The world's largest marsupial carnivore is facing extinction because of a mystery facial can
VOA常速英语2008年（四月）
By Jim Teeple Jerusalem 11 February 2008 For the first time in a decade there is a new accurate census of Palestinians living in the West Bank, the Gaza Strip and East Jerusalem. VOA's Jim Teeple has details from our Jerusalem Bureau. The new census
VOA常速英语2008年（二月）
The bird was a Spix's macaw named Presley, and he was around 40 years old when he died Wednesday. He was thought to be the second-to-last of the remaining wild-born parrots. 这是一只斯皮克斯金刚鹦鹉，名叫普雷斯利。周三那天它离
英语新闻
The ash fall from the last Yellowstone eruption covered all or parts of nineteen western states (plus parts of Canada and Mexico), 上一次黄石火山爆发所喷出的火山灰，铺满了西部19个州的全部地区或部分地区（加上加拿大
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