音标:[,rεərifi'keiʃən] ;
rarefication
[,rεərifi'keiʃən]
n.
= rarefaction

The preservation of embryos and juveniles is a rate occurrence in the fossil record. The tiny, delicate skeletons are usually scattered by scavengers or destroyed by weathering before they can be foss

发表于:2018-12-01 / 阅读(124) / 评论(0) 分类 新东方背诵文选

Rare Minerals May Be in North Korea 稀有矿物质可能在朝鲜发现 Hello and welcome back. Im Jim Tedder in Washington. Today we are going to talk about something that is worth a lot of money, and it is buried in the ground. Were not exactly go

发表于:2018-12-16 / 阅读(73) / 评论(0) 分类 2014年VOA慢速英语(二)月

Libyan opposition forces are fighting for control of Sirte, the hometown of their avowed enemy, Libyan leader Moammar Gadhafi. The rebels have taken swift advantage of a U.N.-backed military campaign that is now under NATO command. Government forces

发表于:2018-12-16 / 阅读(98) / 评论(0) 分类 VOA标准英语2011年(三月)

STEVE INSKEEP, HOST: We have an investigation this morning of drug companies gaming a system designed to help desperate patients. It's a story of orphan drugs. DAVID GREENE, HOST: These are life-saving drugs that pharmaceutical firms don't develop be

发表于:2018-12-18 / 阅读(55) / 评论(0) 分类 2017年NPR美国国家公共电台1月

Rare but Deadly By Susan Brink /2005, U.S. News World Report . All rights reserved with permission. Distributed by Tribune Media Services International. Simple, cheap blood tests could save thousands

发表于:2018-12-19 / 阅读(120) / 评论(0) 分类 彭蒙惠英语

Pre-Listening Vocabulary rare: not common irrational: not reasonable classified: grouped by like qualities provoke: to excite or bother a living thing and cause a reaction initiate: to be the one to start something delicacy: a type of food that is ra

发表于:2018-12-28 / 阅读(47) / 评论(0) 分类 趣谈英语

By Malcolm Brown Washington 09 October 2007 A collection of newly available photographs is shedding fresh light on those who carried out the Nazi holocaust. The public now has the chance to see the contents of an album, thought to have belonged to a

发表于:2019-01-04 / 阅读(60) / 评论(0) 分类 2007年VOA常速英语(十月)

Roger Wilkison Libyan leader Moammar Gadhafi has hailed his first visit to Europe in 15 years as historic and followed up his renunciation of weapons of mass destruction with a pledge to work for worl

发表于:2019-01-04 / 阅读(102) / 评论(0) 分类 VOA2004(上)--各类新闻

Tensions between Switzerland and Libya are continuing to escalate as Libyan leader Moammar Gadhafi enacts a number of retaliatory measures to protest the recent arrest of his son and wife in Geneva. The son, Hannibal Gadhafi and his wife were arrest

发表于:2019-01-13 / 阅读(84) / 评论(0) 分类 VOA标准英语2008年(七月)

By David Byrd Washington 29 May 2008 For most Americans, badminton is a backyard game played at parties and barbecues. But for Eva Lee, it is very serious - she is one of five members of the U.S. Badminton team that will be competing for gold at the

发表于:2019-01-13 / 阅读(104) / 评论(0) 分类 VOA标准英语2008年(五月)

A son of Libyan leader Moammar Gadhafi met senior Bush administration officials Tuesday in another sign of improved U.S.-Libyan relations. Saif al-Islam Gadhafi sees Secretary of State Condoleezza Rice Thursday. VOA's David Gollust reports from the

发表于:2019-01-13 / 阅读(114) / 评论(0) 分类 VOA标准英语2008年(十一月)

Libyan leader Muammar Gadhafi has lashed out at the United States by likening the 1986 U.S. Strikes on Libya to Osama bin Laden's terror attacks on the United States in 2001. He was speaking Thursday in Rome, where he is on a three-day official visi

发表于:2019-01-13 / 阅读(106) / 评论(0) 分类 VOA标准英语2009年(六月)

Libyan head of state Moammar Gadhafi is in Mauritania, where he opened multi-lateral talks aimed at resolving the months-old political crisis there. Libya's leader Moammar Gadhafi (file photo) In his capacity as current head of the African Union, Li

发表于:2019-01-13 / 阅读(102) / 评论(0) 分类 VOA标准英语2009年(三月)

RareGadhafiFootageShowsLibyanDictator'sSofterSide Much of the world has seen the strong, loud and defiant side of the ousted Libyan leader. But there is another side, too. A family man with his granddaughter, recorded on home video found in Tripoli.

发表于:2019-01-13 / 阅读(75) / 评论(0) 分类 VOA标准英语2011年(九月)

RACHEL MARTIN, HOST: Scientists have developed a better test for a very rare brain disease. And as NPR's Rae Ellen Bichell reports, this test could lead to new ways to diagnose more common diseases like Parkinson's and Alzheimer's. RAE ELLEN BICHELL,

发表于:2019-01-16 / 阅读(86) / 评论(0) 分类 2017年NPR美国国家公共电台2月

By Barry Unger Washington 14 December 2007 The year 2007 saw the passing of many well-known international figures who left a lasting impression. VOA's Barry Unger takes a look back at some of these people. Jim Bertel narrates. Former Russian Presiden

发表于:2019-02-04 / 阅读(90) / 评论(0) 分类 VOA常速英语2007年(十二月)

By Melinda Smith Washington, DC 11 December 2006 watching Skipping Medications Skipping medications can be harmful The older we get, the more medications many of us seem to need to stay healthy. It takes more than just a good memory to keep track of

发表于:2019-02-06 / 阅读(110) / 评论(0) 分类 2006年VOA标准英语(十二月)

BEIJING, March 15 (Xinhua) -- China's restrictions on rare earth exports are justified and are in line with World Trade Organization rules, Shen Danyang, spokesman for the Ministry of Commerce, said Thursday. The policy aims to protect resources and

发表于:2019-02-08 / 阅读(72) / 评论(0) 分类 英语新闻

China is the world's largest producer and exporter of rare-earths. These are elements which are critical to the manufacturing of high-tech products, including smartphones, wind turbines and car batteries, among other things. However, the rare-earth i

发表于:2019-02-14 / 阅读(59) / 评论(0) 分类 2016CRI中国国际广播电台

Two extremely rare Bengal white tiger cubs have been born at the wildlife center of the Czech Republic's Liberec Zoo, and are proving popular with visitors. These tiger cubs weigh 6 kilos 13 pounds, and were born two months ago. White tigers are the

发表于:2019-03-12 / 阅读(152) / 评论(0) 分类 cctv9英语新闻2016年
学英语单词
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airdressing
anterior dorsocentral bristles
anthropomorphous
audiphones
call up age
candyflipping
catastrophe cover
chur
cockring
conventional stopping
cross-fertility
discomycotic disease
do something standing on one's head
drug handling enterprise
Dubovskiy
electric magnetic engine
electrochemical equivalention
eminelntia trigemini
exclusive type area
executable machine code
factor analysis method
farmette
first-fruit
Fitch, (William) Clyde
follow-on developmental test
genus Malosma
green veins
Gustalac
havest bug
higher-order residual aberration
holotrichia plumbea
hornets' nests
idonia (cryptopidonia) fushani
invariant strangeness
iodochlorhydroxyquine
iris sibirica l.var.orientalis thunb.
itajai
izumi fever
jack rod
key branches of the economy
large halo
latent reserve
lateral glabellar lobe
low angle laser light scattering
magneto-static energy
middle bearing bracket
millinery blocker
mode degeneracy
nail-tailed kangaroo
Nairobi eye
nested
nonillions
normed vector ring
O Dia
ollanta
ordinary core chamber valve
orthogonal polarization
oscillating mirror scan system
overburden layer
patpend.
people smugglers
piquero
planetarian
powder funnel
press-needle
Proanura
protest against
purpose made
quater-
radiocontrast agent
Rbn
resolution of amino acld
reutilisations
rudiments
Scaddan
screwable
segmental plethysmography
sheepheard
sirkar
social risks
soft machine check
spins round
stackloader
Stand-over
sublingual abscess
surveyor
switchplates
territorial sea strait
tetratrichomonas microti
thanks for patronage
the nimble ninepence
thoracoscopy
tunnel below water course
twin pump
ventilating flue
virtual refusal
vit
vivary
water-cooled reactor
weld cladding process
Writable disc