胚胎发生类型;胚型

Health nbsp; Economics The big story for Washington for 2002 is going to be the November elections. And while that’s a long way off for the rest of the country, it’s very much on politicians- mind

发表于:2018-11-28 / 阅读(303) / 评论(0) 分类 疯狂英语2002年

Federal officials are focusing on manufacturing and processing facilities as they work to get to the bottom of a salmonella outbreak in eggs. The Food and Drug Administration says there haven't been many standards in place for farms like the two in I

发表于:2018-12-02 / 阅读(221) / 评论(0) 分类 2010年NPR美国国家公共电台8月

Lesson 38 Text A Can't She Type? The well-known banker, T. J. Ellington, was at one time in his younger days the manager of a New York office. His secretary had been with him for many years, and knew

发表于:2018-12-02 / 阅读(477) / 评论(0) 分类 初级口语教程

Christopher Reeve: A True Superman Christopher Reeve, the cinematic 1 Superman who became a real-life inspiration for people with spinal 2 injuries through his painstaking struggle to overcome total p

发表于:2018-12-05 / 阅读(438) / 评论(0) 分类 英语沙龙2004全年合辑下

Bella: What's your blood type, Luke? Luke: It's A, I think. Why do you ask? Bella: Well, mine's B. Luke: So? Bella: They say people with A blood type get along very well with those with B blood type. Luke: Really? 你是什么血型? 贝拉:卢克,

发表于:2018-12-08 / 阅读(614) / 评论(0) 分类 赖世雄初级美国英语

Agricultural officials say they think an organic farm in northern Germany was the source of the deadly E. coli outbreak that has sickened more than 2,000 people in Europe. Twenty-two people have died. Investigators traced the bacteria to beansprouts

发表于:2018-12-17 / 阅读(286) / 评论(0) 分类 2011年NPR美国国家公共电台6月

In a landmark development within stem cell research, scientists say theyve used a cloning technique to make embryonic stem cells that match a patients DNA. The journal Nature highlights a study that shows the potential for using the technology to rep

发表于:2018-12-17 / 阅读(422) / 评论(0) 分类 2011年NPR美国国家公共电台10月

发表于:2019-01-02 / 阅读(462) / 评论(0) 分类 知性英语

HEALTH REPORT - Gene Therapy Used to Treat Cancer | Stem Cell Study Leads to Criticism, QuestionsBy VOA Staffs Broadcast: Wednesday, September 06, 2006 This is the VOA Special English Health Report. A

发表于:2019-01-02 / 阅读(302) / 评论(0) 分类 2006年慢速英语(九)月

This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? One of the dreams of biomedical scientists is to be able to transform adult cells into other kinds of cells. And thus avoid some of the ethical concerns of working with

发表于:2019-01-08 / 阅读(284) / 评论(0) 分类 Scientific American(十一)月

President Obama says a preliminary agreement reached today with Russian President Dmitry Medvedev is an important step toward increasing nuclear security. We have signed a joint understanding for a follow-on treaty to the START agreement that will r

发表于:2019-01-08 / 阅读(271) / 评论(0) 分类 2009年NPR美国国家公共电台7月

HEALTH REPORT - New Embryonic Stem Cell Lines Developed for Researchers By Paul Thompson Broadcast: Wednesday, August 11, 2004 This is Gwen Outen with the VOA Special English Health Report. Researcher

发表于:2019-01-08 / 阅读(257) / 评论(0) 分类 健康与经济

By Carol Pearson Washington 16 April 2007 Watch Diabetes report Type 1 diabetes can affect anyone but it usually starts in people younger than 30. It is a lifelong disease, and there is no cure. But doctors recently tested a stem cell therapy that a

发表于:2019-01-09 / 阅读(337) / 评论(0) 分类 2007年VOA标准英语(四月)

This is the VOA Special English Health Report. Bethesda, Maryland, near Washington, D.C., is home to the National Institutes of Health. N.I.H. calls itself the Nation's Medical Research Agency. But it supports research worldwide with its budget of a

发表于:2019-01-11 / 阅读(238) / 评论(0) 分类 VOA慢速英语2008年(十一)月

AS IT IS 2015-11-02 Can Fish Teach Humans to Regrow Teeth? 人类能学习鱼类的牙齿再生术么? Most people are born with two sets of teeth. They use baby teeth to break down food as children. As they become adults, the baby teeth are replaced

发表于:2019-01-12 / 阅读(233) / 评论(0) 分类 2015年VOA慢速英语(十一)月

By Ted Landphair Washington 26 July 2007 For a second time in a year, President Bush has vetoed a bill that would have sanctioned federally funded stem cell research using human embryos. His stance reflects conservatives' view that destroying life to

发表于:2019-01-12 / 阅读(298) / 评论(0) 分类 2007年VOA标准英语(七月)

An end to grey hair and crows-feet could be just 10 years away after scientists showed 科学家发现,动物的衰老过程有可能逆转。 it is possible to reverse ageing in animals. 从此以后,可能仅需10年,人类就可以告别白发

发表于:2019-02-01 / 阅读(293) / 评论(0) 分类 趣味英语

Finding a Healthier Lifestyle - Committing to Change Everyone wants to live a healthier lifestyle and everyone wants to look better in their swimsuit. However, many people don't know where to begin or what questions to ask. Six months ago I was in th

发表于:2019-02-08 / 阅读(374) / 评论(0) 分类 阅读空间

WASHINGTON, April 16 (Xinhua) -- Researchers at the University of Colorado (CU) have found that lack of a specific gene interrupts neural tube closure, a condition that can cause death or paralysis. The study was the cover story this week in the jour

发表于:2019-02-18 / 阅读(303) / 评论(0) 分类 英语新闻

Bella: Whats your blood type, Luke? 贝拉:卢克,你是什么血型? Luke: Its A, I think. Why do you ask? 卢克:我想是A型。你问这干嘛? Bella: Well, mines B. They say people with A blood type get along very well with those with

发表于:2019-02-27 / 阅读(385) / 评论(0) 分类 天天练口语
学英语单词
addictive personality
adjustable shore
adrostral
animation sequence
average vector power
biofraction
biokoes
bleating
boxcar
Boxmeer
budding knife
camemberts
catcaller
chromosome nucleolus
cinder path
cirsium arvenses
cis-configuration polymer
clamp bias
classical trajectory calculation
codicils
conflict free
congenital methemoglobinemia
cut-sheet
deiodinations
Diastix
double-winding alternator
drayage
dubbies
Eaglesham
earth electrode system
El Caco
ferenti
fluospar
fur seals
fused silver nitrate
go flooie
half peak wavelength
have one too many
heterogeneousstate
induction variable expression
infectible
juke joint
Kata Pusht
lagerphone
lochlan
magnetooptical analysis
Magnox type reactor
mamoru
Marbledale
maximum self-conjugate sub-group
mega-radian
merchandise selection
metaphysial chondrodysplasia
mortifieth
mud cracking
neoxanthops quadrilobatus
neutrophil leucocyte
nobody's perfect
note-case
Nrzi, non-return to zero inverted.
nubiler
oquassa
order-embedding
over-urbanization
overwent
pavement investigation
phosphorplate
potable-water
pouring ladle
praya reticulata
probable maximum storm surge
pseuds
Qareh Chāy
radiation-superheater
radio-frequency trap
religions views of nature
remonetised
resigning
resistance to bending
retrochiasmatic
ring rim type rotor
sandwich unit
star contactor
static page
straight-line gale
strigillation
sweeping anchor
the liquid crystal filter
theopoetics
thick-walled cylinder
time-controlled gain
Tissen
tokograph
turbine stub shaft
under command of
unmassacred
unmorbid
value of elasticity
vasoepididymography
vpk
water-resistant watch
wones