乙氧三乙硅烷

Mr. President, Mr. Speaker, Members of the Congress of the United States: The gravity of the situation which confronts the world today necessitates my appearance before a joint session of the Congress. The foreign policy and the national security of

发表于:2018-12-04 / 阅读(404) / 评论(0) 分类 名人演讲

AS IT IS 2014-05-25 Scientists Search for New Ways to Stop Mosquitoes 科学家们寻找新的方法来对付蚊子 The sound of a mosquito can mean trouble in many parts of the world. The bite of a mosquito can be deadly. Today, we will hear about s

发表于:2018-12-08 / 阅读(197) / 评论(0) 分类 2014年VOA慢速英语(五)月

美科学家研发新一代驱蚊剂 In many regions of the world, mosquitoes are a seasonal pest. In other regions, they carry serious diseases like malaria. The World Health Organization estimates that almost 630,000 people died of malaria-related

发表于:2018-12-19 / 阅读(151) / 评论(0) 分类 VOA双语新闻 2014年1月

Plant Self-defense Plants may appear to be helpless in the face of hungry,toothy animals but many plants have evolved interesting systems of self-defense. Coarse meadow grasses are a good example. If you run your finger along a blade of coarse grass,

发表于:2018-12-31 / 阅读(130) / 评论(0) 分类 英语听力文摘 English Digest

86 去痛片须慎用 DATE=8-16-01 TITLE=SCIENCE REPORT - OxyContin Warning BYLINE=Jerilyn Watson (Start at 1'02

发表于:2019-01-02 / 阅读(176) / 评论(0) 分类 科技之光

Christmas Celebrated AZUZ: And of course, Christians around the world celebrated Christmas on December 25th, marking the birth of Jesus. One of those celebrations, which you see right here, was held in the city of Bethlehem, the site where Jesus was

发表于:2019-01-08 / 阅读(434) / 评论(0) 分类 CNN2010年(一)月

AS IT IS 2015-07-14 Silica Sand Mining Worries Communities 美国硅砂矿引发社区担忧 The United States is increasing production of oil and natural gas through a process known as fracking. This process is sometimes called hydraulic fracking be

发表于:2019-01-12 / 阅读(165) / 评论(0) 分类 2015年VOA慢速英语(七)月

By Alisha Ryu Nairobi 24 September 2007 The spokesman for the new Eritrea-based Somali opposition alliance tells VOA that the group's Islamist-led forces are in an all-out war against Ethiopian troops in Somalia in a bid to oust the Ethiopians from t

发表于:2019-01-13 / 阅读(245) / 评论(0) 分类 2007年VOA标准英语(九月)

By Al Pessin Pentagon 23 January 2008 A senior U.S. commander in Afghanistan says Taliban and al-Qaida forces in the Pakistan border area are turning their attention more toward Pakistan, and are working together to hit Pakistani forces. Major Genera

发表于:2019-01-13 / 阅读(188) / 评论(0) 分类 VOA标准英语2008年(一月)

The faithful have flocked to the West Bank town of Bethlehem to celebrate Christmas. Christians gather on Christmas Day inside the Church of Nativity, believed by many to be the birthplace of Jesus Christ, in the West Bank town of Bethlehem, Thursda

发表于:2019-01-13 / 阅读(192) / 评论(0) 分类 VOA标准英语2008年(十二月)

Promising Mosquito Repellent Announced美科学家研发新一代驱蚊剂 In many regions of the world, mosquitoes are a seasonal pest. In other regions, they carry serious diseases like malaria. The World Health Organization estimates that almost 6

发表于:2019-01-14 / 阅读(156) / 评论(0) 分类 VOA标准英语2014年(一月)

One Police stops on police vehicle outside one Victoria's Bar. After the preparation, as necessary arrests?, this liquor drive slightly mixes. Suddenly he sees to have a young people shakely goes out from bar, spend the many figures only then finds

发表于:2019-01-17 / 阅读(123) / 评论(0) 分类 白领英语晨读

AILSA CHANG, HOST: Despite mounting evidence and a stream of dire warnings, federal regulators and mining companies failed to protect coal miners from toxic dust. MARY LOUISE KELLY, HOST: NPR and the PBS series Frontline spent more than a year lookin

发表于:2019-01-19 / 阅读(152) / 评论(0) 分类 2018年NPR美国国家公共电台12月

Beginners. Well, it's time for a new dog. For the past year, we have been a one dog family. But, you know, our dog, Rosie, is a wildly social lady. She goes crazy any time she meets another dog, a cat, a mouse, or a bird, let alone a human. But, the

发表于:2019-01-28 / 阅读(153) / 评论(0) 分类 英语博客 A cup of English

By Melinda Smith Washington 14 May 2007 Top executives of the company that makes a powerful painkiller called Oxycontin admitted this week they lied about the drug's addictive qualities in order to boost sales. As VOA's Melinda Smith reports, worldwi

发表于:2019-02-03 / 阅读(199) / 评论(0) 分类 2007年VOA标准英语(五月)

Beginners. Today, Foxy had an appointment with the vet for vaccinations and a general check-up. She is about eight months old, so she needed her second set of vaccinations. The vet also needed to see if her growth was normal and healthy. I put her in

发表于:2019-02-07 / 阅读(175) / 评论(0) 分类 英语博客 A cup of English

On its website, a history of the company makes no mention of leador indeed of Thomas Midgleybut simply refers to the original product as containing a certain combination of chemicals. 在它的网站上,公司的历史没有提及铅──也没有提

发表于:2019-02-17 / 阅读(147) / 评论(0) 分类 万物简史

By counting back through these layers and measuring the amount of lead in each, he could work out global lead concentrations at any time for hundreds, or even thousands, of years. The notion became the foundation of ice core studies, on which much mo

发表于:2019-02-17 / 阅读(165) / 评论(0) 分类 万物简史

Lead is a neurotoxin. Get too much of it and you can irreparably damage the brain and central nervous system. Among the many symptoms associated with overexposure are blindness, insomnia, kidney failure, hearing loss, cancer, palsies, and convulsions

发表于:2019-02-17 / 阅读(167) / 评论(0) 分类 万物简史

If you were going to a restaurant and wanted a healthier option, 如果你去饭店,你想吃得健康一点, which would you choose, grilled or fried chicken? 你会选择哪种食品呢,烤鸡还是炸鸡? Now most people would answer grill

发表于:2019-02-21 / 阅读(184) / 评论(0) 分类 TED演讲教育篇
学英语单词
Abū Tisht
aft-topmast
Angelica longipes
anhydrous methylamine
applaudeth
auditor's standard report
backgrounded
bargainbasement
berimbaus
bider
Bremm
buffeting test
Byng, Julian Hedworth George
carry off a prize
clean bowled
co-opetition
compulsory redundancy
constant course line
craniofacial implant
date of departure
davit pedestal
degree of a divisor
demeter
E10
El Kef, Gouvernorat de
epiphora
ethnic relations
Fibiger
files for
fission (fragment) particle
flip-open cut-out fuse
fornix conjunctiv? inferior
Francois' disease
frequent flood
geotechnical index property test
germ-free room
grudgekin
handshaking protocol
haute
have a say in the matter
heat of sublimation
hilkers
hippies
hydrodynamic similitude
hydroxyethylenediaminetriacetic acid (HEDTA)
imbesell
inferior tracheobronchial lymph nodes
integral invariant
ion association complex
ironical
jocks you
knocking behavior
Langford, Seno
Loganton
malleable-casting
mattu
moral wear
mould base
munida asprosoma
niviventer coninga
nonelectrolyte
nurse-root grafting
of one mind
off days
Oklo natural reactor
on line working
overnighters
partes prostatica
performulation
peter pepper
phase-shifting transformer
play-night
playing fields
pod person
polysemantic word
push screw
radial aeroengine
ratio of slenderness
reference line for frame
right close
sarcomatous change of leiomyoma of uterus
serum transfusion
skyscrapered
slip mortise
SMZ-SD-TMP
snow crust
solid-state shift
Songjong-ni
special hardening
sterile floral leaf
suction valves
swept band
technical analysts
topology of differentiable manifold
torque viscometer
trade adjustment
unescoes
unflinchingly
unsurfaced
vicaress
viscosity of wash liquid
whole-step