激光跃迁频率

By Carol Pearson Washington 30 April 2008 Ten years ago, the U.S. Food and Drug Administration approved LASIK, eye surgery with a laser that enables people to see without glasses. But about five percent of LASIK procedures fail, and those patients ca

发表于:2018-12-08 / 阅读(217) / 评论(0) 分类 VOA常速英语2008年(四月)

What's the frequency kenneth is your benzedrine Uh huh I was braindead locked out numb not up to speed I thought I'd pegged you an idiot's dream Tunnelvision from the outsider's screen I never understood the frequency Uh huh You wore our expectations

发表于:2018-12-13 / 阅读(297) / 评论(0) 分类 Friends 老友记全10季英语插曲

EXPLORATIONS - The History of the Laser Welcome to EXPLORATIONS in VOA Special English. Im Mario Ritter. This week, we tell about one of the most recognizable objects in science fiction the laser. It is one of the best examples of how technology can

发表于:2018-12-16 / 阅读(217) / 评论(0) 分类 2013年VOA慢速英语(二)月

Economics Report - A Closer Look at High-Frequency Trading 经济报道 - 近距离审视股票市场高频交易 This is the VOA Special English Economics Report. 这里是美国之音慢速英语经济报道。 Once, stocks were traded through the

发表于:2018-12-16 / 阅读(258) / 评论(0) 分类 2011年VOA慢速英语(十)月

New Laser Device Helps Parkinson's Patients Walk 新激光设备帮助帕金森患者重获行走能力 Parkinsons disease slowly destroys the brains ability to control the muscles, depriving the patients of their mobility. Researchers at the Mayo Cl

发表于:2018-12-16 / 阅读(217) / 评论(0) 分类 VOA标准英语2014年(二月)

Grammar Girl here. Today, Bonnie Trenga will help us choose better transition words. This article could make you a tad hungry, because today were comparing the art of writing to the art of making a sandwich. In fact, just for today, we might need to

发表于:2019-01-02 / 阅读(211) / 评论(0) 分类 英语语法 Grammar Girl

On January 11, Norway became the first country to begin turning off signals from its FM radio network. The Norwegian stations will instead use only digital audio broadcasting, called DAB. FM, or frequency modulation, radio stations have been in opera

发表于:2019-01-02 / 阅读(286) / 评论(0) 分类 2017年VOA慢速英语(一)月

The United States Navy has demonstrated a new laser weapon operating in the Persian Gulf. The Laser Weapons System, or LaWS, is deployed on the USS Ponce transport ship. A live test firing of the weapon was recently carried out for Cable News Network

发表于:2019-01-02 / 阅读(236) / 评论(0) 分类 2017年VOA慢速英语(七)月

In 1963, President John Kennedy gave a famous speech at American University. In the speech, Kennedy said the following lines: Our problems are manmade; therefore, they can be solved by man. And man can be as big as he wants. No problem of human desti

发表于:2019-01-03 / 阅读(225) / 评论(0) 分类 2017年VOA慢速英语(九)月

This is All Things Considered. I'm Michelle Norris. Phone calls from Sweden woke up two American scientists this morning, John Hall and Roy Glauber. They will share the Nobel Prize for Physics with a German Researcher Theodor Haensch. All three worke

发表于:2019-01-08 / 阅读(306) / 评论(0) 分类 2005年NPR美国国家公共电台

Monday's meeting at the White House between President George Bush and President-elect Barack Obama is the latest symbol of a presidential transition that appears to be moving ahead smoothly, at least initially. VOA National correspondent Jim Malone

发表于:2019-01-09 / 阅读(254) / 评论(0) 分类 VOA标准英语2008年(十一月)

The History of the Laser Welcome to EXPLORATIONS in VOA Special English. Im Mario Ritter. This week, we tell about one of the most recognizable objects in science fiction the laser. It is one of the best examples of how technology can go from the sci

发表于:2019-01-12 / 阅读(280) / 评论(0) 分类 2013年VOA慢速英语(五)月

EXPLORATIONS - The Laser: Futuristic Science Found at Your Local Store MARIO RITTER: Welcome to EXPLORATIONS in VOA Special English.Im Mario Ritter. This week, we tell about one of the most recognizable objects in science fiction the laser. It is one

发表于:2019-01-12 / 阅读(245) / 评论(0) 分类 2012年VOA慢速英语(一)月

High Frequency Traders Under Scrutiny 美司法部调查高频交易 The U. S. Justice Department is investigating the relationship between high frequency trading firms and major exchanges -- and regulators in Washington and the state of New York are

发表于:2019-01-14 / 阅读(276) / 评论(0) 分类 VOA标准英语2014年(四月)

今天我们要学的词是transition。 Transition, 是过渡的意思。A smooth transition, 就是平稳过渡。古巴总统卡斯特罗宣布辞去国务委员会主席的职务。美国总统布什表示,希望古巴能由此开始向民主过渡

发表于:2019-01-25 / 阅读(241) / 评论(0) 分类 英语每日一词

By Paul Sisco Washington 14 November 2007 At the McDonald Observatory in western Texas, a unique space program has been quietly underway for more than 30 years. It is called the Lunar Laser Ranging Program. VOA's Paul Sisco has more. Research scienti

发表于:2019-01-31 / 阅读(254) / 评论(0) 分类 VOA常速英语2007年(十一月)

今天我们要学的词是transition。 Transition, 是过渡的意思。A smooth transition, 就是平稳过渡。古巴总统卡斯特罗宣布辞去国务委员会主席的职务。美国总统布什表示,希望古巴能由此开始向民主过渡

发表于:2019-01-31 / 阅读(212) / 评论(0) 分类 英语单词荟萃

By Al Pessin Pentagon 19 October 2007 The U.S. military's effort to rebuild major infrastructure in Iraq will be winding down during the coming year, leaving the Iraqi government to fund the effort and to find engineers capable of handling the projec

发表于:2019-01-31 / 阅读(241) / 评论(0) 分类 2007年VOA常速英语(十月)

There are many ways to express the frequency of events. Here are just a few. 你可以用许多方式来表达事情发生的频率,以下仅为其中一些。 1. a few times 1.几次 2. all the time 2.总是 3. almost always 3.几乎总是 4. almo

发表于:2019-02-03 / 阅读(264) / 评论(0) 分类 实用英语

NATO's secretary-general says foreign forces in Afghanistan will remain on combat duty during the scheduled transition to Afghan security control in 2014. That statement by Anders Fogh Rasmussen came after U.S. Defense Secretary Leon Panetta said Ame

发表于:2019-02-08 / 阅读(217) / 评论(0) 分类 英语新闻
学英语单词
a penny wedding
air drying sealant
air-impervious fabric
angelica sylvestris l.
angle reducer( reducing elbow )
apotomin
array algorithm
B.I.T.
be under medical treatment
bienfait
borsella
boutinots
cargo-sharing arrangement
casing point
center of channel
Chelles
chinny
cisterna chyli
Claudine
cochron boiler
computer automated test system
deepbody spinefoot
deferred maintenace
despairable
double radial engine
Drummore
dry-labbed
empty desk syndrome
enterocelia
excess loss insurance
focal distance of the monochromater
footmark
forcess of umar al-mukhtar
foreign exchange instrument
foreign legions
ghaf
glacier corn
Gledhill
gomphosphaeria aponina
graphical interpolation
guarded
gum-digger
high-speed oscillating sieve
hot-gas measuring point
Humash
hypervelocity launcher
hypolimnial
Iltutmish
inangulated
income distributions
indicter
inflation pressure thermometer
keziah
lady fish
limit ordinal
limnophlia (brachylimnophlila) inaequalis
liquidless
livestock propagated and raised by oneself
local electron magnetism
Louho
lysosomal storage disease
masrite
melaniridosome
Mindenmines
morrelle
narayanans
Nauvon
nilgau
nitreous
norbolethone
one generation household
one more minute
oxyboosted blast
perforated false bottom
polypentamethylene azelamide
post-controlled vocabulary
power users
prohibition of import
quai hai
qujila
rail clamp
re-arrangements
Real Video
rotatory drier
school infection
screenable
sealed porosity
Shakespearianism
sherk
shielding plug
spider shaft
t-y joint
tangential equation
technology of reinforced plastics
toria
transmissible mutagen
Tylophora renchangii
untunes
up gas
virtual CPU time
West Haddon
wet off