[电] 电阻温度系数

Cells cannot remain alive outside certain limits of temperature and much narrower limits mark the boundaries of effective functioning. Enzyme systems of mammals and birds are most efficient only withi

发表于:2018-12-01 / 阅读(239) / 评论(0) 分类 新东方背诵文选

SCIENCE IN THE NEWS - Scientists Search for the Lost City of Atlantis FAITH LAPIDUS: This is SCIENCE IN THE NEWS, in VOA Special English. Im Faith Lapidus. BOB DOUGHTY: And Im Bob Doughty. Today, we tell about efforts to find the lost city of Atlanti

发表于:2018-12-07 / 阅读(104) / 评论(0) 分类 2011年VOA慢速英语(四)月

World Action Needed to Prevent Widespread Antibiotic Resistance Since the discovery of penicillin in 1928, we have used antibiotics against a host of infections. But now, doctors are finding that more and more bacteria are resistant to even the stron

发表于:2018-12-08 / 阅读(87) / 评论(0) 分类 VOA标准英语2015年(十二月)

Forcing Electrons into Superconducting Line In a study in the journal Nature researchers created a pseudo gap, in which electrons in superconducting materials line up just before flowing resistance-free. Sonya Buyting reports Imagine a world with lev

发表于:2019-01-02 / 阅读(220) / 评论(0) 分类 60秒科学

The spokesman for the Lord's Resistance Army says Congolese forces and U.N. peacekeepers in Congo Kinshasa are preparing to move against the rebel group, which has yet to sign a peace deal to end a 20-year reign-of-terror in the region. VOA Correspo

发表于:2019-01-06 / 阅读(137) / 评论(0) 分类 VOA标准英语2008年(九月)

Some bacteria have adapted to super cold environments for millions of years. And scientists have isolated some of the essential genes that allow bacteria to tolerate their harsh living conditionsbecause these same genes might help in the creation of

发表于:2019-01-11 / 阅读(127) / 评论(0) 分类 英语杂谈

Antibiotics Breed Drug Resistance in Pigs Pigs given low doses of antibiotics had more E. coli in their guts, and that bacteria showed an increased resistance to antibiotics, according to new research. The study confirms the routine practice of feedi

发表于:2019-01-13 / 阅读(81) / 评论(0) 分类 VOA标准英语2012年(一月)

Vidushi Sinha | Washington, DC 18 May 2010 The World Health Organization calls antibiotic resistance one of the three greatest threats to human health. Experts fear antibiotic resistance puts humans in danger of becoming nearly defenseless against so

发表于:2019-01-13 / 阅读(129) / 评论(0) 分类 VOA标准英语2010年(五)月

Obama Hosts Top Teenage Scientists Fourteen-year-old business owner Joe Hudy and one of his inventions, a compressed air cannon that shoots marshmallows, attracted President Obamas attention at the White House Science Fair. The president invited Joe

发表于:2019-01-14 / 阅读(82) / 评论(0) 分类 VOA标准英语2012年(二月)

Kenya: Misuse of Antibiotics Leading to Resistance by Immune System NAIROBI In Kenya, the rise of drug resistant bacteria could reverse the gains made by medical science over diseases that were once treatable. Kenyans could be at risk of fatalities a

发表于:2019-01-14 / 阅读(108) / 评论(0) 分类 VOA标准英语2015年(一月)

Scientists Race to Contain Malaria: New Discoveries, More Resistance Artemisinin has helped cut global malaria deaths by more than 25 percent over the past decade. But now, in parts of Southeast Asia, this drug no longer works. And the World Health O

发表于:2019-01-14 / 阅读(77) / 评论(0) 分类 VOA标准英语2013年(五月)

By Mil Arcega Washington 09 April 2007 Watch Boeing Fuel Efficient Jets Boeing 787, Fuel Efficient Jets After years of lagging behind European rival Airbus, Boeing says 2007 is shaping up to be a very good year. The Chicago based airplane manufacture

发表于:2019-01-16 / 阅读(152) / 评论(0) 分类 2007年VOA标准英语(四月)

As Assault On Mosul Looms, Resistance Grows And ISIS Grows More Brutal play pause stop mute unmute max volume 00:0003:43repeat repeat off Update Required To play the media you will need to either update your browser to a recent version or update your

发表于:2019-01-17 / 阅读(102) / 评论(0) 分类 2016年NPR美国国家公共电台10月

Artemisinin, also known as QingHaoSu in Chinese, was discovered by Chinese scientist Tu Youyou. She received the 2015 Nobel Prize for Physiology and Medicine for the drug's discovery by her team more than three decades ago. In her speech at the Karol

发表于:2019-01-19 / 阅读(149) / 评论(0) 分类 2015CRI中国国际广播电台

By David McAlary Washington 10 January 2007 One of the main weapons to prevent mother-to-child transmission of the AIDS virus during birth is the drug nevirapine. But when nevirapine is used alone just once, HIV starts becoming resistant to it. Rese

发表于:2019-02-04 / 阅读(115) / 评论(0) 分类 2007年VOA标准英语(一月)

爱的反抗力 Muse - Resistance Resistance Muse Is your secret safe tonight? And are we out of sight? Or will our world come tumbling down? Will they find our hiding place? Is this our last embrace? Or will the walls start caving in? (It could be w

发表于:2019-02-05 / 阅读(88) / 评论(0) 分类 好听的英文歌曲

BEIJING, Oct. 13 (Xinhuanet) -- Scientists have decoded the genome of Black Death which caused one of the worst plagues in human history. The finding was published Wednesday in the scientific journal Nature. A team of German, Canadian and American sc

发表于:2019-02-07 / 阅读(134) / 评论(0) 分类 英语新闻

Scientists have determined it's not advisable to hurry marriage. Get the scoop on the best age to be wed. 科学家们建议,结婚也不可以操之过急。现在,让我们对应该何时结婚来探个究竟吧。 We doubt you were shocked whe

发表于:2019-02-08 / 阅读(97) / 评论(0) 分类 阅读空间

If you want to boost your childs results at school, you could do a lot worse than ensuring that they do plenty of exercise. Scientists have already shown that physical activity can make you brainier. But a team in America has used scans to show that

发表于:2019-02-17 / 阅读(121) / 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(98) / 评论(0) 分类 英语新闻
学英语单词
acid-frac
anchor clutch
auriculo-ventricular node
backsizing
Becke's sign
bombardier
business-cards
CAM (computer aided manufacturing)
carburated
coherence of laser beam
coliform group
combed
constituent act
constrainers
crinkle roots
crops which are resistant to water rot
crude arsenic
deadly weapon
depth of ballast
diglycolic acid
display help
dragonists
dried ice
enediolate
Entrance Island
ex distribution
extra-striate
fames bovina
fawnskin
find algorithm
fireland
fixed radio beacon
flavor strength
formatted screen image
free as the wind
gaffe-prone
gastronom
geosynchronous-orbit satellite launch vehicle
Gigantorhynchus
guard mail
guide pass
hydrolytic acidity
HYDROT
ice-marginal terrace
implicit consent
index of business
International Brigade
isolation barrier
left pedal
left-hand side
Likounda
lithium-iodine battery
low pressure steam generator feed pump
LRSC
M. L. S.
mad point
Maragoji(Maragogi)
MCA
miracidial
moisture retardant
mountainite
murtons
Nasser City
Nei Mongol
never for one minute
Newtonian-Cassegrain telescope
nicoracetam
nomogramm
nonexclusive binding
per unit area yield
platform length
point designation grid
power freguency
process interface system
productivisms
progenesis
reflexes to know how
retainage
round robins
Sakan'ya
satsuma insignis
scientific pay off
scrimpiness
Shebalino
silicon sheet varnish
smoke-up
social mediation
solution effect
Sommariva del Bosco
spector-
supply flume
technical plant
tenderloin steak
tracheal recess
tradomation
tribal marketing
unhomelike
us national security
Usogorsk
weckamine
zone broadening