胚循环系

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(246) / 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(171) / 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(347) / 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(183) / 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(314) / 评论(0) 分类 2011年NPR美国国家公共电台10月

This is Scientific Americans Sixty-second Science. Im Cynthia Graber. This will just take a minute. Poor old spleen, it never got the recognition it deserved. Until now. Scientists had known that the spleen is part of our immune systems. But it was c

发表于:2018-12-24 / 阅读(153) / 评论(0) 分类 Scientific American(八)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(219) / 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(218) / 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(176) / 评论(0) 分类 2009年NPR美国国家公共电台7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(168) / 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(213) / 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(189) / 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(171) / 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(151) / 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(206) / 评论(0) 分类 2007年VOA标准英语(七月)

听力题目: 17.(A). Henry was startled by the dogs bark. (B). The dog barked because Henry was jumping. (C). Henry jumped over the dog. (D). The dog barked in spite of Henrys commands. 18.(A). He explained all about the circulatory system. (B). H

发表于:2019-01-18 / 阅读(143) / 评论(0) 分类 托福听力单句训练

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(191) / 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(267) / 评论(0) 分类 阅读空间

They say Jan. 18 or Blue Monday is the most depressing day of the year, but they're wrong. The most depressing day of the year is today, because you're about to find out how and when you're most likely to die. 人们总说蓝色星期一,即1月18号

发表于:2019-02-18 / 阅读(158) / 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(192) / 评论(0) 分类 英语新闻
学英语单词
acknowledging whistle
adosterol
alpha-particle decay
aronioides
asynergy minor
Berengar
blood and thunder story/tale
bouffant caps
breaking current
carry sth out
catalytic hydrocracking
cherry-colored
Cohen-Macaulay ring
comparative parasitology
computer keyboards
consummator
corona-discharge
corvuss
creep function
crossing over, crossing-over
Cruces, P.de las
cytoplasmon
Dendrotubus
descending lamella
diamagnetic loop
disfigureth
dragendorff's reagent
electric box furnace
English hornist
Errington
eudaimonisms
extension bed lathe
eyebrow flashes
fibroserous membranes
Fischer ellipsoid
flecce of Stilling
Fossano
frothing reagent
gandara
geyserland
gift wraps
green hardness tester
grid priming voltage
hitzig
hornett
hourly earnings
Hubnet
improve on sth
in the interest(s) of
in the trenches
insoluble salt
interpenetration twin (interpenetrant twin)
kaonium
kopke
Lamina medialis processus pterygoidei
lap-jointed
larrykins
leakage magnetic flux
legyor
live in idleness
localizer antenna
marginal wood ferns
melanaspis smilacis
metastrongylid
method of computation
Michałowice
monoethyl malonate
nasal demon
non-prime bill
Orroli
outbade
palmitate
PCV valve
peak peak
permalloys
petalurid
pig on pork
Pokol'ka
produce of deadlock
pulled elbow
put out
Raskatikha
Saussurea tridactyla
schwartz inequality
shamshak
single-electron tunneling transistor
sodium hippurate
space modulation
spectroscopic splitting
starting and stopping mechanism
STRAC
streptomycin sulfate
sturtite
televised meeting
temperature coefficient of voltage reg
trolley cage
turning-circle
vacuum condensing point
Venetian window
wasband
Werda
Ximaol