标签：基因 相关文章
The descendants of longtime urban dwellers show increased genetically driven resistance to tuberculosis, due to evolutionary selection pressure over millennia. Christopher Intagliata reports 城市长久居住民的后代，经过数千年的自然选择
60秒科学
AGRICULTURE REPORT – January 29, 2002: Genetically Engineered Crops Increasing By George Grow Soybeans This is the VOA Special English AGRICULTURE REPORT. Increasing numbers of farmers are growing g
农业与发展
AGRICULTURE REPORT - Study of a Biotech Plant Finds Pollen Can Travel Farther than Thought By Mario Ritter Broadcast: Tuesday, October 05, 2004 This is Gwen Outen with the VOA Special English Agricult
农业与发展
Documentary Tells of Last Astronaut to Walk on Moon 讲述月球行走的纪录片 AUSTIN, TEXAS In 1972, Eugene Cernan and two fellow astronauts began what would become the last mission to the moon, Apollo 17. On December 14, 1972, after scratching
VOA标准英语2015年(三月)
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 Agriculture Report. 这里是美国之音慢速英语农业报道。 White rice is the world's most popular form of rice. But it goes through a milling process that removes many nutrients. As a result, people who eat a
2011年VOA慢速英语(三)月
How Did Dogs Become Mans Best Friend? 狗是如何让成为人类最好的朋友的呢？ Weve all heard the phrase dog is mans best friend. But how did dogs get to be so friendly with humans? It turns out that dog domestication wasnt simply a matter
初学者听力文摘精选
Most of us have had the same experience. We see a big, red tomato in the grocery store, take it home for our salad, and find out that it tastes like cardboard. 大多数人都有过这样的经历，从商店里挑选出又大又红的番茄回去做沙
初学者听力文摘精选
Its taken ten years of experiments. But researches at the University of Rhode Island have finally perfected a fish with 6-pack abs, and muscular shoulders. Professor Terry Bradley said his fish have 15% to 20% more muscle mass than normal trout. Bulk
万花筒2010年
Meet the latest Internet sensation, Libya's Muammar Gaddafi. The embattled leader is the source of numerous spoofs that have gone viral. One video shows him having a phone conversation with Hitler, while another shows him performing a rendition of Ge
万花筒2011年
Rising seas and severe storms are the most talked-about threats of climate change, but here's another, no more coffee. Because rising temperatures may cripple wild populations of / coffee, the most cultivated species in the world. So says a study in
Scientific American(十一)月
Tuberculosis killed 1.4 million people last year. One reason TB is so deadly is that TB bacteria mutate quickly. But some scientists are hoping to get a step ahead of TBs changes in the future by studying its past evolution. Remnants of TB genes can
Scientific American(十一)月
By Carol Pearson Washington 14 January 2008 For years autism has baffled researchers and devastated families. Autism typically appears in the first three years of life. Symptoms include problems with communication, difficulty forming relationships an
VOA标准英语2008年（一月）
Genome Shows Humans More Gorilla-like than Thought Sixty scientists worked over five years to sequence the genome of a single female lowland gorilla, the last of the great apes to have its DNA mapped. According to lead author Aylwyn Scally, of the Tr
VOA标准英语2012年(三月)
Oncotype DX基因检测 When samples of breast tissue show the presence of a malignant tumor, doctors often prescribe surgery followed by a six-month treatment of medicine, which could include chemotherapy to prevent further spread of cancer cells. 乳
VOA标准英语2016年(一月)
Theres been a lot of talk about space travel in the news, a new mission to the moon, future missions to Mars, spacecraft that have traveled much further away than the red planet. But beyond whats technologically possible, whats physically possible? S
CNN美国有线新闻2018年4月
Wheat helped create civilization in the Middle East. Its a staple crop for 30 percent of the worlds population. And now, with the publication of four articles in the journal Science, were close to a detailed understanding of the bread wheat genome. W
2014年Scientific American(七)月
Wheat helped create civilization in the Middle East. Its a staple crop for 30 percent of the worlds population. And now, with the publication of four articles in the journal Science, were close to a detailed understanding of the bread wheat genome. W
2014年Scientific American(七)月
Body odor. The smell of BO is unmistakable. And the culprit(犯人) behind that signature stench(恶臭) is a molecule called thioalcohol(硫醇). Our noses are so attuned(理解的) to it, we can pick up quantities as small as one part per trillion.
2015年Scientific American(四)月
D:I feel bad for male squirrel monkeys. Y:What?Why? D:Because they cant detect the colors red and greentheyre red-green colorblind. Y:Maybe,but scientists at the University of Washington used gene therapy to make squirrel monkeys produce proteins tha
英语时差8，16