标签：embryo 相关文章
Medical milestone tonight making world headlines, the first woman ever to have a successful uterus transplant is now pregnant, doctors are being cautious but they are encouraged tonight, and here is ABC's Lama H. 22 year old Derya Sert is something o
万花筒2013年
Scientists Test Different Ways for Saving Rhinos 科学家们尝试不同的方式拯救犀牛 The African rhino is a seriously endangered species and one subspecies, the northern white rhinoceros, is on the brink of extinction. After the recent deat
VOA标准英语2015年(八月)
A: Continuing with our class, today we are going to study briefly the miracle of life. Many of you may think you already know how babies come to be, but I am sure that some of the things that we will be talking about today may surprise you. Billy ，
纯正地道美语
Unit 74 Will We Follow Dolly, the Sheep? Hearing Scottish scientists' success in cloning a sheep from a single adult cell, the world cones to an unsettling realization: the science is the easy part. it's not that the breakthrough was not decades in t
英语流行话题阅读：语境识词4500
《英语流行话题阅读:语境识词3500》Unit71:寻找代孕母亲
英语语境识词
Why Does Spot Have Spots? In dogs with multicolored coats, white areas have no pigment cells. Black, brown or yellow areas, on the other hand, get their color from special pigment cells. When a dog is just an embryo, these pigment cells travel from t
英语听力文摘 English Digest
President Obama has lifted restrictions on the use of federal money for research using embryonic stem cells. Some researchers are already making progress using stem cells from umbilical cord blood, which entails no controversy since there is no dest
VOA标准英语2009年(三月)
By Efam Dovi Accra 23 August 2006 In Ghana, a high court in the capital Accra Tuesday sentenced five robbers to more than 300 years in prison in what the police say is a clear sign the country is taking violent crime seriously. The spate of armed ro
2006年VOA标准英语（八月）
SCIENCE IN THE NEWS - American Scientists Create The World's First Genetically Engineered Monkeys CHRISTOPHER CRUISE: This is SCIENCE IN THE NEWS, in VOA Special English. Im Christopher Cruise. JUNE SIMMS: And Im June Simms. Today, we tell about the
2012年VOA慢速英语(二)月
By Melinda Smith Washington 27 June 2007 President Bush speaking at the White House about stem cell research, 20 Jun 2007 Some U.S. scientists say President Bush's veto last week of federal funding for stem cell research raises questions about the f
2007年VOA标准英语（六月）
Save the Eggs Vaccine makers crack the eggshell and inject the virus into the white stuff surrounding the yolk. Then they reseal the egg, the embryo becomes infected, and the virus is allowed to copy itself trillions of times over. And they use eggs
英语听力文摘 English Digest
U.S. President Barack Obama has lifted restrictions on federal funding for medical research using human embryonic stem cells. Mr. Obama says it is part of a broader effort to limit political interference in science. President Barack Obama signs an E
VOA标准英语2009年(三月)