台式激光器

VOICE ONE: I'm Steve Ember. VOICE TWO: And I'm Barbara Klein with Explorations in VOA Special English. Today we tell about a large National Park established to protect the culture of ancient Native Americans. It is called Mesa Verde. (MUSIC) VOICE O

发表于:2018-11-27 / 阅读(442) / 评论(0) 分类 VOA慢速英语2008年(十二)月

STEVE EMBER: Im Steve Ember. BARBARA KLEIN: And Im Barbara Klein with EXPLORATIONS in VOA Special English. Today we tell about a large National Park established to protect the culture of ancient Native Americans. It is called Mesa Verde. (MUSIC) STEV

发表于:2018-12-07 / 阅读(51) / 评论(0) 分类 2011年VOA慢速英语(三)月

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(86) / 评论(0) 分类 VOA常速英语2008年(四月)

National Parks Called Americas Best Idea Welcome to This Is America in VOA Learning English. I'm Jim Tedder. And I'm Kelly Jean Kelly. This week on our program, we talk about national parks in the United States. The United States established its firs

发表于:2018-12-16 / 阅读(67) / 评论(0) 分类 2013年VOA慢速英语(七)月

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(76) / 评论(0) 分类 2013年VOA慢速英语(二)月

AS IT IS 2016-06-20 Green Card Holder Deported Mickel Mesa, a 28-year-old legal permanent resident of the United States, had not seen his family in the Dominican Republic for many years. So, in December 2013, he and his sister flew to the Caribbean n

发表于:2018-12-16 / 阅读(67) / 评论(0) 分类 2016年VOA慢速英语(六)月

EXPLORATIONS - Mesa Verde National Park in Colorado: Protecting the Culture of Ancient Native AmericansBy Marilyn Christiano and Shelley Gollust Broadcast: Wednesday, May 24, 2006 (MUSIC) VOICE ONE: I

发表于:2019-01-02 / 阅读(66) / 评论(0) 分类 2006年慢速英语(五)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(92) / 评论(0) 分类 2017年VOA慢速英语(七)月

Life was not easy when Emma Seguy first arrived in Mesa, Arizona. The 20-year-old was born in Paris, France. But when she was 16, she decided she wanted to be more independent and to try something new. So, Seguy asked her parents if she could complet

发表于:2019-01-03 / 阅读(93) / 评论(0) 分类 2018年VOA慢速英语(六)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(121) / 评论(0) 分类 2013年VOA慢速英语(五)月

EXPLORATIONS - Mesa Verde National Park: Protecting the Culture of Ancient Native Americans STEVE EMBER: Im Steve Ember. BARBARA KLEIN: And Im Barbara Klein with EXPLORATIONS in VOA Special English. Today we tell about a large National Park establish

发表于:2019-01-12 / 阅读(73) / 评论(0) 分类 2012年VOA慢速英语(四)月

National Parks Called Americas Best Idea 今日美国美国国家公园 Welcome to This Is America in VOA Learning English. I'm Jim Tedder. And I'm Kelly Jean Kelly. This week on our program, we talk about national parks in the United States. The Uni

发表于:2019-01-12 / 阅读(69) / 评论(0) 分类 2013年VOA慢速英语(十)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(87) / 评论(0) 分类 2012年VOA慢速英语(一)月

Mesa Verde National Park: Protecting an Ancient Culture 梅萨维德国家公园:古代北美洲土著人文化的保护地 EDITOR'S NOTE: This year, the U.S. National Park Service turns 100. Americans 28th President, Woodrow Wilson, formed the Natio

发表于:2019-01-12 / 阅读(51) / 评论(0) 分类 2016年VOA慢速英语(四)月

The answer lies in the effects of North Americas immense and fluctuating ice sheets. As they grew, they locked up so much water that the sea levels began to fall. The Bering Sea between Asia and North America began to drain away, leaving a bridge of

发表于:2019-01-23 / 阅读(58) / 评论(0) 分类 探索与发现2012年

But back then, they had serious competition from the giant short-faced bear. The short-faced bears bone chemistry reveals it was a carnivore and up to a ton, probably the largest meat-eating mammal that ever walked the earth. On its long legs, it ran

发表于:2019-01-23 / 阅读(81) / 评论(0) 分类 探索与发现2012年

Chapter Seven 第七章 The mesa was like a ship becalmed in a strait of lion-coloured dust. 崖顶螈像一艘静静旋泊在狮子黄的海湾边的船。 The channel wound between precipitous banks, and slanting from one wall to the other across t

发表于:2019-01-29 / 阅读(55) / 评论(0) 分类 美丽新世界

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(105) / 评论(0) 分类 VOA常速英语2007年(十一月)

Topics: Redshirting; Mesa Verde National Park; to wrap up; to bother versus to interrupt versus to disturb; blind spot Words: to redshirt to count toward kindergarten cutoff to hold back peer prevalence cliff dwelling outcropping cave artifact to wra

发表于:2019-02-15 / 阅读(50) / 评论(0) 分类 美语听力 English Cafe

I think there are a lot of reasons, but I first want to address the one that you're probably most likely to have heard of, 我觉得理由很多,但是我首先想要弄清一个概念,可能大家也都听过, because actually it's more danger

发表于:2019-03-16 / 阅读(253) / 评论(0) 分类 TED演讲科学篇
学英语单词
a.t.p.
Acalypha matsudae
acute form
admissible count rate
Aedes scapularis
AGP slot
Alpagut
anti-subsidy duty
appressed
atob
autocovariance
Babylonian Captivity
bald-pated
Bishopdale
bizarre nucleus
blast gauge
bronze ordiary
cauterion
circinal
container load activity meter
control of construction quality
coordination of supplies
countermand of a check
Demoivre's formula
demoscene
Dewy Rose
draw vise
dusty money
dynamic state approach
educational propaganda
empty category
Fernandel
fine tuning
finned type heating coil
fluororoentgenography
front-end concentrator
GCT
gub'mint
hard-news
HDSL
henriksen
hermenegildo
hexatomic acid
hubbubbed
illumination standard
in absolute cash terms
in panic
income and expenditure accounts
insect survey
interconnected system
kebles
kernel ice
Kosovo conflict
kymelen
laborlore
layout line
Lombelombe
lorentzs
loss forward
low temperature distillation
megascolecids
modulus selection
nanoconductor
neurone doctrine
niggardlier
nonmorphometric
open rectangle
optimum relay servomechanism
Orange GGN
Pekes
Pfyn
pleasureness
posterior parietal artery
preformationists
put on foot
Radiotelegram.
rapid fatigue test
red blood cell life span
regiones nasalis
remittance house
rent and rates
rim type sprocket
rock forming minerals
senecio vulgariss
senhors
shadowings
spectral detectivity
spiedino
stemplot
subbiconic
subnet number
superstimulate
Swiss-cheese hyperplasia
synchro-control transformer
tidal flood current
time amplitude
time varying
transit trunk
triamorph
twin screw
Tyomycin
waltziest