胚胎死亡

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(329) / 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(247) / 评论(0) 分类 2010年NPR美国国家公共电台8月

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(479) / 评论(0) 分类 英语沙龙2004全年合辑下

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(322) / 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(449) / 评论(0) 分类 2011年NPR美国国家公共电台10月

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(344) / 评论(0) 分类 2006年慢速英语(九)月

One of the goals of regenerative medicine is to make tissue to replace our own damaged body parts. Thats still a ways off. But starting with mouse embryonic stem cells, researchers have succeeded in creating heart muscle that actually beats. The stud

发表于:2019-01-08 / 阅读(316) / 评论(0) 分类 Scientific American(十)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(327) / 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(303) / 评论(0) 分类 2009年NPR美国国家公共电台7月

From NPR News in Washington, I'm Jack Speer. In a surprising development, the lawyer for disgraced money manager Bernard Madoff has told a federal judge he will plead guilty later this week to 11 charges that will result in a life sentence. NPR's Ma

发表于:2019-01-08 / 阅读(292) / 评论(0) 分类 2009年NPR美国国家公共电台3月

President Barack Obama today moved to officially lift the Bush administration's restrictions on human embryonic stem cell research. The move reverses a 2001 directive from Mr. Obama's predecessor in the White House. At a signing ceremony in the East

发表于:2019-01-08 / 阅读(294) / 评论(0) 分类 2009年NPR美国国家公共电台3月

The State Department is warning Americans abroad to be on alert for possible protests against the US after a Florida church announced it would burn copies of the Koran this Saturday. Ahead of that, NPR's Michele Kelemen reports governments worldwide

发表于:2019-01-08 / 阅读(314) / 评论(0) 分类 2010年NPR美国国家公共电台9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(296) / 评论(0) 分类 健康与经济

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(273) / 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(260) / 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(325) / 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(325) / 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(410) / 评论(0) 分类 阅读空间

WASHINGTON, Nov. 14 (Xinhua) -- Nearly a fifth of all Americans 12 years or older have hearing loss so severe that it may make communication difficult, according to a new study led by Johns Hopkins University researchers and published Monday in the A

发表于:2019-02-18 / 阅读(287) / 评论(0) 分类 英语新闻

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(345) / 评论(0) 分类 英语新闻
学英语单词
adenocystoma
all else
allosteric ligand
Althorp House
analog-to-digital conversion
angusticlave
apatite jacupirangite
ashcombes
aspartic acid
Atanga
automatic charge indication
Ballygawley
basic anxiety
baulk line
bethroots
boff out
bottom loading conveyer
camera sensitivity
caudal saddle
Cayley algebra
chained sublibraries
cleansingly
continental-scale
crop someone's feathers
crude corn sugar
cyclopentadienyl compound
d.d.o.
distributing and regulating module
double-walled cylindrical graphite sleeve
Dracocephalum rupestre
endemic influenza
ergotamine caffeine
Eria dasyphylla
exchange trunk
fee simple subject to condition subsequent
fibred asbestos
fittall
florencite-(Ce)
fluorophytosterol
full-wave bridge
general survey of soil and land planning
genus masdevallias
geriopsychosis
gigglers
handroll
happy family
have the neck to do something
HPA -23,HPA 23
industrial factory building
Insh
intermediate frequency signal
just-in-time (jit)
kiddles
latch guide
lender of last resort system
listen to music
low capacity cable
micro emulsion
mirror with glass foot
multiple osteoma
normal yield-table
off-line work
outconnector
Ovsyannikovo
paste molding
pipes down
placenta allantoidea
Poulton
pre renaissance
productivists
puffinesses
Quik-Cult
Rauchfuss'sling
reaction camera
refrigerated plant for foodstuffs
request queue
rescue basket
reversible magnetic process
rolling-circle
screw driving motor
scrub-brush
settlement test
shallow system organization
shepherd's crook arm
solvent craze resistance
somenopor
sonpeimine
spectrum-selectivity characteristic
squatting facet
stigmata croci
survival equation
time of hatch closing
toxic neprosclerosis
transverse crosstalk coupling
triple dial timer
trivial topology
trypots
two-stage capturing method
tzarism
ultrashort waves
vrddhied
xeroriparian