音标:['rɪfrɪndʒənsɪ] ;
折射系数
n. The power possessed by a substance to refract a ray;
as, different substances have different refringencies.

By Dan Robinson Two U.S. lawmakers just returned from Sudan say the situation in the western Darfur region remains intolerable, and are urging the government in Khartoum to take further actions to all

发表于:2018-12-08 / 阅读(115) / 评论(0) 分类 VOA2004(下)--新闻盘点

Sonja Pace Israeli troops have withdrawn from one key neighborhood of the Rafah refugee camp in the southern Gaza Strip, lifting a six-day siege and allowing residents out of their homes to again move

发表于:2019-01-03 / 阅读(131) / 评论(0) 分类 VOA2004(上)--国际时事

By Peter Heinlein Shimelba Refugee Camp, Northern Ethiopia 31 October 2007 Rising tensions between Ethiopia and Eritrea have led to an increasing flow of refugees across their common frontier. A border war between the Horn of Africa neighbors from 19

发表于:2019-01-09 / 阅读(126) / 评论(0) 分类 2007年VOA常速英语(十月)

The itsy bitsy spider climed up the water spout. Down came the rain, and washed the spider out. Up came the sun, and dried up all the rain, And the itsy bitsy spider went up the spout again.

发表于:2019-01-09 / 阅读(365) / 评论(0) 分类 鹅妈妈童谣

By Douglas Bakshian Manila 08 April 2008 A chapter of history is closing in the Philippines as the last Vietnamese refugees in the country head for Canada in a humanitarian program called Freedom At Last. They are the last of an estimated 2,500 Vietn

发表于:2019-01-11 / 阅读(144) / 评论(0) 分类 VOA常速英语2008年(四月)

By Greg Flakus Houston 24 March 2008 Results of an internal party election in Mexico have raised fears of more political turmoil with possible implications for the United States as well. VOA's Greg Flakus has the story from our Houston bureau. At a t

发表于:2019-01-12 / 阅读(163) / 评论(0) 分类 VOA标准英语2008年(三月)

Oum Sok began working as a cyclo driver when he was 18. He says the city has become very expensive over the years, making it much harder to earn a living. New York has its yellow cab. London has its red bus. But Phnom Penh has its cyclo - a three-whe

发表于:2019-01-13 / 阅读(187) / 评论(0) 分类 VOA标准英语2010年(六)月

By Brian Wagner Miami 02 October 2007 Ecuador's leftist President Rafael Correa is promising to move quickly on government reforms following Sunday's vote that apparently gave his supporters a majority in a special assembly to rewrite the country's c

发表于:2019-01-16 / 阅读(214) / 评论(0) 分类 2007年VOA常速英语(十月)

By Chad Bouchard Mae Sot, Thailand 03 October 2007 Communities along Thailand's border with Burma are closely watching for signs of a new wave of refugees following violence in Rangoon over the past week. As Chad Bouchard reports from the Thai border

发表于:2019-01-16 / 阅读(179) / 评论(0) 分类 2007年VOA常速英语(十月)

Anjana Pasricha India's prime minister-designate Manmohan Singh is promising to balance economic reforms with development for the poverty-stricken. He also says he will continue the peace process with

发表于:2019-01-19 / 阅读(133) / 评论(0) 分类 VOA2004(上)--国际时事

By Peter Heinlein Addis Ababa 07 February 2008 It used to be called The Club of Dictators. The African Union (AU), and before it the Organization of African Unity, lists among its alumni such infamous characters as Idi Amin, Charles Taylor, Sane Abac

发表于:2019-01-26 / 阅读(153) / 评论(0) 分类 VOA常速英语2008年(二月)

By Jim Malone Washington 28 February 2008 The war in Iraq has reemerged as a central issue in the U.S. presidential election campaign. In recent days, Republican contender John McCain and Democratic candidate Barack Obama have exchanged verbal salvos

发表于:2019-01-31 / 阅读(166) / 评论(0) 分类 VOA常速英语2008年(二月)

By Phuong Tran Nouakchott, Mauritania 13 July 2007 French engineer Jean Sahuc arrived in West Africa in the early 1950's to oversee the building of Mauritania's capital. Almost 50 years after he laid the first foundation stones in Nouakchott, Sahuc t

发表于:2019-02-01 / 阅读(157) / 评论(0) 分类 2007年VOA标准英语(七月)

The UN refugee agency reports thousands of Congolese refugees have fled to Uganda and Rwanda in the past few days seeking safety from escalating fighting in North Kivu province. Rebel forces loyal to renegade leader Laurent Nkundu have made serious

发表于:2019-02-03 / 阅读(133) / 评论(0) 分类 VOA标准英语2008年(十一月)

By Alan Silverman Holywood 13 January 2007 A child's fairy tale fantasy provides her refuge from the ravages of war in a vividly imaginative film by Mexican-born writer-director Guillermo del Toro. Alan Silverman has a look at Pan's Labyrinth. Ivana

发表于:2019-02-05 / 阅读(185) / 评论(0) 分类 2007年VOA标准英语(一月)

By Edward Yeranian Beirut 03 September 2007 Authorities in Lebanon say they have identified the body of Chaker al Abssi, the leader of the Palestinian Fatah al-Islam group, that has been holed up inside a Tripoli refugee camp. The group held the camp

发表于:2019-02-06 / 阅读(197) / 评论(0) 分类 2007年VOA标准英语(九月)

The British head of the U.N. Mine Action Program in southern Lebanon, Christopher Clark, and his 990-member team of mine clearers will receive the 2008 Nansen Refugee Award. The U.N. refugee agency says the prize recipients are being honored for the

发表于:2019-02-12 / 阅读(174) / 评论(0) 分类 VOA标准英语2008年(九月)

U.S.A. fans are disappointed their soccer team is no longer in the World Cup. But, thanks to the U.S. team's inspiring run that has fueled interest in the tournament, they're still watching and so are soccer fans from around the world who happen to f

发表于:2019-02-12 / 阅读(132) / 评论(0) 分类 VOA标准英语2010年(七)月

By Elizabeth Lee Washington 16 October 2009 Man is transported to hospital room The U.S. Senate Finance Committee has approved a sweeping health care reform bill aimed at lowering insurance costs and expanding coverage to more Americans. In the comm

发表于:2019-02-12 / 阅读(130) / 评论(0) 分类 VOA标准英语2009年(十月)

By Phuong Tran Gaga, Chad 14 May 2007 For years, hundreds of thousands of Sudanese who fled fighting in Darfur have received shelter in refugee camps in neighboring Chad. But having survived the violence, they now face a new threat in the deadly AIDS

发表于:2019-02-17 / 阅读(320) / 评论(0) 分类 2007年VOA标准英语(五月)
学英语单词
actinoxanthine
age of earth crust
aggrates
alarm-scanning and data-logging system
Anthracosia
asexual division
at the expense
ATP-sensitivity
bed cover
bill sticker
biodeposition
Bissetia
brass die casting
Bubnoff
buy wholesale
capitalize
cascade transition detector
cavalet
cerebro-convolute
common raccoons
conformational repeating unit
consumering zone
corporate client
d'angers
d'avola
darreh-ye bahabad
Darstein
desludging valve
dimensionalized
dogwood family
dragon boat festival
drive robot
eastman-kodak
feretrum
focusing telescope
form building
fossil flour
four-leaf twill
gas welding work
generator bracket
Gorgosaurus
ground constant
groundberries
group meetings
had a flair for
holey bread
illutation
import licence position
individual contactor equipment
jujamcyn
keratogram
Kerrobert
krejci
law of supply and demand
lift pit
linear precedence function
machinery place zero people
malpasses
Manyanga
marginal density
mithridatism
non remunerative
nonpractitioners
normal deflection
nubility
Orbitoididae
paciable
Paramillo, Cerro
pelates quadrilineatus
perimeter fence
perinatal mortality
phloroglucinol monoethyl ether
picnic areas
piezoelectric earphone
pin out
power spillover
preset governor
ptas.,Ptas.
pteridophytous
real-time bit mapping
reclamp
regional economies
reluctance synchronous machine
reproductive imagination
rotovating
sifalimumab
sludge-gas holder
soap-ashes
SQDG
tail wall unit
taravad
tendinous hiatus
the spirit of the law
to-fret
topical prostaglandin eyedrop
triple valve piston
under-reaming
unfretted
uterine mouth
voluper
Wonsan-hang
Zagwe Dynasty