网膜雷射

第一章 视器 Chapter 1 Visual Organ accessory organs of eye 眼副器 adipose body of orbit 眶脂体 aqueous humor 房水 bulbar conjunctiva 球结膜 central artery of retina 视网膜中央动脉 chambers of eyeball 眼房 choroids 脉络膜 ciliary body 睫状体 ciliary

发表于:2018-12-05 / 阅读(225) / 评论(0) 分类 医学英语

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(162) / 评论(0) 分类 VOA常速英语2008年(四月)

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(152) / 评论(0) 分类 2013年VOA慢速英语(二)月

Bring home a bucket of fried chicken and you may find that people have strong feelings about which part of the bird is best. Well, scientists at Washington University in St. Louis say the answer is: the eyes. At least when you compare them to our own

发表于:2018-12-24 / 阅读(145) / 评论(0) 分类 Scientific American(二)月

Even a visit to the grocery store can overload the senses. It's noisy, bright and smelly. The nose is working overtime. High up inside, specialized nerves dangle in the airstream. They detect chemicals in the air and send an electrical signal to the

发表于:2018-12-30 / 阅读(184) / 评论(0) 分类 国家地理2007年

For many of us, walking in the rain can be a pleasant and even soothing experience. For those of us who wear glasses, though, drops of water on the lenses and obscured vision can have us running for c

发表于:2018-12-31 / 阅读(168) / 评论(0) 分类 有声英文阅读

吃鸡肉时,你知道鸡身上的哪个部分是最好的吗?科学家的回答是:眼睛。科学发现,鸡的视网膜锥(体) 数量比人类多,因此可以感知更多的色彩。 Super Chicken Vision Bring home a bucket of fried chic

发表于:2019-01-02 / 阅读(172) / 评论(0) 分类 60秒科学

Two studies of perception: the retinas of depressed people are far worse at responding to contrast; people doubt statements more when the speaker has a foreign accent. A couple of studies on perception. First, theres now visual data to back up the id

发表于:2019-01-02 / 阅读(145) / 评论(0) 分类 60秒科学

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(164) / 评论(0) 分类 2017年VOA慢速英语(七)月

​Apple has said that its latest computer operating system, Mavericks, is available free of charge. The California-based company made the announcement Tuesday at an event in San Francisco. 苹果公司表示,其最新款的电脑操作系统Maveri

发表于:2019-01-05 / 阅读(137) / 评论(0) 分类 CCTV9英语新闻2013年10月

A couple of studies on perception. First, theres now visual data to back up the idea that everything looks kinda gray when you feel blue. Researchers examined how the retina responds to different black-and-white contrast situations. They did the test

发表于:2019-01-08 / 阅读(176) / 评论(0) 分类 Scientific American(七)月

By Melinda Smith Washington 10 July 2007 A recent study in the Journal of the American Medical Association shows that older people who carry certain genes are more susceptible to a loss of their central vision. That loss of sight is an advanced form

发表于:2019-01-09 / 阅读(239) / 评论(0) 分类 2007年VOA标准英语(七月)

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(218) / 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(185) / 评论(0) 分类 2012年VOA慢速英语(一)月

Eye Test May Reveal Parkinsons Disease Earlier Parkinson's disease is usually discovered too late in patients for effective treatment. But now there's a new eye test that could diagnose the devastating condition much earlier. The degenerative conditi

发表于:2019-01-14 / 阅读(181) / 评论(0) 分类 VOA标准英语2016年(九月)

激光手术,大饱眼福 For many of us, walking in the rain can be a pleasant and even soothing experience. For those of us who wear glasses, though, drops of water on the lenses and obscured vision can have us running for cover. Interested in re

发表于:2019-01-30 / 阅读(143) / 评论(0) 分类 双语有声阅读

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(192) / 评论(0) 分类 VOA常速英语2007年(十一月)

In this Moment of Science Don gives Ya?l a neat trick to play on her brain. You might want to try it, too. D: Here's a simple demonstration you can do with cool implications. Find a large object that is brightly colored--let's make it a green door. S

发表于:2019-02-15 / 阅读(128) / 评论(0) 分类 英语时差8,16

Like glasses, contact lenses work by bending light rays just the right amount to make the object come into focus on the retina at the back of the eye. Sometimes the eyes natural lens has an imperfection or may not be shaped properly, which can make y

发表于:2019-02-15 / 阅读(155) / 评论(0) 分类 英语时差8,16

At some point in our childhoods it dawns on us how incredibly great it would be to turn invisible. Just imagine all the places you could sneak into! Think of all the things you'd get to see! Well, nobody knows yet how to make a person invisible. But

发表于:2019-03-06 / 阅读(194) / 评论(0) 分类 英语时差8,16
学英语单词
A student
agapanthagenin
Aitken's generalised least-squares estimator
angle with a silver hook
arles (france)
autobar
Benedict-Webb-Rubin equation
boiler capacity
brake calipers
bridge deck concrete
by the seat of one's pants
byees
carcinectomy
caustic alcohol
chain-smokes
chlorine dosing room
columban spirits
complete alternation
confidential details
consumption of steam
Curzon Line
deletion character
demonax triarticulodilatatus
direct ancestor
double-break switch
draw the curtain over
Draw three
drinkability
dubick
dysprotein(a)emia
elth
et seqq.
eurotras
final penetration
flash 18 sterilization
float type gyroscope
forest on land liable to inundation
foulag
ghaden
go-under
gowie
graphic system
guillotine tuner
hovater
instrument-making industry
Isaac of Nineveh
keep someone's finger on the pulse
laser speedometer
liubas
Lontara
made shift
mammillary reflex
mnemotechnists
NAUTILIDA
naysa
nonconiferous
oncomodulin
operational modes
order Liliales
ordered state
outstanding rq
Oxalid
parallel computer system
party-leader
penicillin V potassium
peripateticisms
photoisomerizations
pibutidine
pinhole filter
pregeijerene
processor history register
programme controlled computer
quantum world
rayleigh
realtime computer
resistance tolerance
rewind bench
roderic
Saray Burun
sbf
selenographist
sequential risk function
serum osmolarity
shelaghs
Shelbourne
sir john
sitobion rosaeiformis
slot raise
spalling of refractory
storage map
system test time
temporary state
therium
trickest
unidirectional hydrophone
unplated steel plate
Wachendorf's membrane
wanton damage
wesar
with all with all proper reserves
womb-envy
yeast fuagi