[网络] 激光都卜勒血流计;雷射都卜勒血流计

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(154) / 评论(0) 分类 VOA常速英语2008年(四月)

088 distance and speed Words Near/close far rush hurry crawl pace velocity wide tall long short length deep narrow broad high depth shallow short-cut long-distance rapid slow fast quick height low faraway Phrases Take(time) A drive/walk A distance of

发表于:2018-12-10 / 阅读(158) / 评论(0) 分类 情景英语口语100主题

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(139) / 评论(0) 分类 2013年VOA慢速英语(二)月

Do you like working up a sweat? Or do you feel like maybe sweat should work for you? Well, hold on to your sudoriferous glands. Because researchers have designed a device that could someday produce power from your perspiration. The schvitzy scheme wa

发表于:2018-12-24 / 阅读(133) / 评论(0) 分类 2014年Scientific American(八)月

Leaving Old Bahama Channel, which is fourteen leagues wide by 350 meters deep, the Gulf Stream moves at the rate of eight kilometers per hour. 从巴哈马运河出来时,海湾暖流在14里宽、350米深的范围内以每小时8公里的速度流动

发表于:2018-12-31 / 阅读(133) / 评论(0) 分类 《海底两万里》中英双语有声读物

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(154) / 评论(0) 分类 2017年VOA慢速英语(七)月

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. It's April 15th. Like many people around the country, you might be feeling your blood pressure rise as you deal with everyone's favorite activityfiling

发表于:2019-01-08 / 阅读(182) / 评论(0) 分类 Scientific American(四)月

超声成像 ultrasonic imaging 实时成像 real-time imaging 灰阶显示 gray scale display 彩阶显示 color scale display 经颅多普勒 transcranial doppler 彩色多普勒血流显像 color doppler flow imaging 彩色血流造影 color flow

发表于:2019-01-08 / 阅读(172) / 评论(0) 分类 医学英语

AS IT IS 2013-08-19 Survival Shelters, Tornadoes and Old Ironsides 生存避难所,龙卷风和老铁壁 Hello, and welcome to the Monday edition of As It Is, our daily show for people learning everyday American English. 大家好,欢迎大家收听周

发表于:2019-01-12 / 阅读(152) / 评论(0) 分类 2013年VOA慢速英语(八)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(211) / 评论(0) 分类 2013年VOA慢速英语(五)月

AS IT IS 2013-09-11 Rising Temperatures Could Mean More Wildfires 不断上升的气温可能会意味着更多的森林大火 From VOA Learning English, welcome to As It Is! Im Mario Ritter. On our show today, we hear from two weather experts. We he

发表于:2019-01-12 / 阅读(278) / 评论(0) 分类 2013年VOA慢速英语(九)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(175) / 评论(0) 分类 2012年VOA慢速英语(一)月

Worldwide Fight Against Malaria Appears to Succeed 在世界范围内抗击疟疾似乎有成功的趋势 From VOA Learning English, this is Science in the News. Im Anna Matteo. And Im Christopher Cruise. Today we will tell about malaria and efforts

发表于:2019-01-12 / 阅读(112) / 评论(0) 分类 2014年VOA慢速英语(四)月

Nature, Nurture Required for Elite Athletes Doctors Michael Joyner and Michael Bostwick at the Mayo Clinic in Minnesota studied this and also looked at other research. Most high-level athletes have something that distinguishes them from regular peopl

发表于:2019-01-13 / 阅读(146) / 评论(0) 分类 VOA标准英语2012年(八月)

AUDIE CORNISH, HOST: Each year, malaria kills about half a million people around the world. Health officials say a fast, cheap, accurate way to test for malarial infection would be extremely helpful in combating the disease. As NPR science correspond

发表于:2019-01-16 / 阅读(165) / 评论(0) 分类 2018年NPR美国国家公共电台5月

In warm weather, maggots can eat 60% of a dead human body in less than a week. This lot will probably manage a mouse before midnight. A few meters away in the next room, Josh and Alex prepare for battle, and not just with their computer games, there'

发表于:2019-01-22 / 阅读(145) / 评论(0) 分类 自然百科2013年

生活大爆炸第一季第六集_1:The Middle Earth Paradigm -Rajesh: Okay, if no one else will say I will. We really suck at paintball. 好吧,如果没人说那就我来说。我们在彩弹比赛中的表现实在太差了! -Howard: That wa

发表于:2019-01-28 / 阅读(252) / 评论(0) 分类 生活大爆炸第一季

49 深海水流正逐渐减少 DATE=7-25-01 TITLE=SCIENCE REPORT - Reduction in Deep Sea Current BYLINE=Caty Weaver (Start at 59

发表于:2019-01-30 / 阅读(238) / 评论(0) 分类 自然探索

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(182) / 评论(0) 分类 VOA常速英语2007年(十一月)

Doppler on Wheels Rolls Into Tornados Doppler radar reads the weather based on reflections from items moving through the air. Joshua Wurman was the first to put the technology on wheels and drive it directly into the path of a tornado. I invented Dop

发表于:2019-02-17 / 阅读(205) / 评论(0) 分类 VOA常速英语2013年(八月)
学英语单词
(a)esthetic analysis
actinologists
acute-phases
adhesion agent
altauna
Ambgaon
antitactical ballistic missile
aurigny
besoothment
Bogoria, L.
calcisilicarenite
calibrated ring
carotid ganglia
chlorophorus annularis
civil liability for oil pollution damage
Committee on Appropriations
comprehensive flare index
cophin
crack stress
cross dimensions
damped wave detector
diplochlumydeous
double reeling machine
drillosteoclasis
enchondromas
excessive allowance
fixed base machinegun
foreign geography
foughten
fragmentedness
function decoder
generation life table
Gentiana asterocalyx
go-around computer
gratineed
gravity-gradient satellite
hemicranial
henry (h)
inbold
infinite product
intralobar part
intrastranded
jungermanniaceaes
Khodutka, Sopka
L-shaped incision
lalumia
laudatio
left half axle
limiting vacuum
Little Lord Fauntleroy
living quarter
magnipend
marginal oilwell
maximum throughput
moorable
morbidostatic
mother-in-law apartment
mustarder
narcicriptine
natural experiment
Nev.
nominal expenditure
normal low water level
object graticule
outsuffers
Palo Seco
parvity
pedal retaining collar
pencil crayon
photocathode radiant sensitivity
piston and cylinder
pooeys
prevailing wood species
price of money
profit volume
pubertal inflection
rhabdosoma brevicaudatum
savings and credit co-operative
scatella bullacosta
seed harvesting and processing machinery
shii tree
shirleys
skip car loader
sliding clamp
spheroidisation
spotted silver carp
superacid solution
swinging axis
tah
teches-teches
thalassemias
the dow-jones industrial average
tracheal cyst
tripod table
trisamine, trisamino
tupelo families
unbelligerent
ventilating duct spacer
vibratome
vinificators
wing-vein