氢分子激光器

Broadcast: February 14, 2003 By George Grow This is the VOA Special English Environment Report. President Bush has offered a plan to speed development of technology that uses hydrogen as fuel. His goa

发表于:2018-12-07 / 阅读(233) / 评论(0) 分类 VOA2003(上)-科技导航

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(200) / 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(189) / 评论(0) 分类 2013年VOA慢速英语(二)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(195) / 评论(0) 分类 VOA标准英语2014年(二月)

Item eight. Vocabulary. fossil, molecule, hydrogen, carbon, sulfur. Petroleum has been important since ancient times. In Latin, the name means rock oil. Petroleum is a fossil fuel. The liquid comes from the remains of plants and animals that died mil

发表于:2018-12-27 / 阅读(157) / 评论(0) 分类 step by step 3000 第一册

For something that could revolutionize the world, its come along very slowly. The fuel cell was invented in 1839, but there was little development until the 1950s when NASA started to use them in space where they are still used today. Now, after yea

发表于:2018-12-30 / 阅读(240) / 评论(0) 分类 国家地理2008年

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(212) / 评论(0) 分类 2017年VOA慢速英语(七)月

Hyaluronic acid - the largest glycosaminoglycan known, it plays an important role of restricting the flow of water in tissues, particularly in synovial fluid where it acts as a lubricant.. Hydrogen bo

发表于:2019-01-03 / 阅读(171) / 评论(0) 分类 医务英语

Ecological balance - astable balance in the numbers of each species in an ecosystem. In the ecosystem of the mouth this balance is brought about by competition and cooperation between the different or

发表于:2019-01-03 / 阅读(224) / 评论(0) 分类 医务英语

Covalent bond - a strong bond between atoms formed by sharing outer electrons. When an atom has 8 outer electrons it is stable. Those which naturally have 8, like neon and argon gasses are quite unrea

发表于:2019-01-03 / 阅读(238) / 评论(0) 分类 医务英语

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(284) / 评论(0) 分类 2005年NPR美国国家公共电台

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(254) / 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(226) / 评论(0) 分类 2012年VOA慢速英语(一)月

[0:0]lable laboratory lad lag标签,标记 实验室 男孩,小伙子 落后,滞后 [1:9.3533]lamb landlord landscape lane羔羊,小羊 地主,房东,店主 风景,景色 小路,小巷 [1:52.8522]largely laser latter laughter大部分,主要地 激光器 后者的,末了的 笑,笑声 [2:36.6

发表于:2019-01-16 / 阅读(345) / 评论(0) 分类 闭着眼睛飘单词 四级词汇

For something that could revolutionize the world, its come along very slowly. The fuel cell was invented in 1839, but there was little development until the 1950s when NASA started to use them in space where they are still used today. Now, after year

发表于:2019-01-22 / 阅读(187) / 评论(0) 分类 自然百科2008年

Why Teflon Is Slippery Teflon is the trademark name for PTFE, a type of plastic. If you own any non stick cookware, then you probably use PTFE on a daily basis. You might not realize, as you fry your morning eggs, that PTFE is one of the most slipper

发表于:2019-01-22 / 阅读(360) / 评论(0) 分类 英语时差8,16

Because chemists for so long worked in isolation, conventions were slow to emerge. Until well into the second half of the century, the formula H2O2 might mean water to one chemist but hydrogen peroxide to another. C2H4 could signify ethylene or marsh

发表于:2019-01-29 / 阅读(196) / 评论(0) 分类 万物简史

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(234) / 评论(0) 分类 VOA常速英语2007年(十一月)

We are rediscovering the enigmas(谜团) of the Moon and they're really in our own backyard Dr Jim Garvin, Nasa Goddard Space Flight Center Moon water has world in a twitter A surprising amount of water has been found to exist in the Moon's soil. Data

发表于:2019-02-18 / 阅读(181) / 评论(0) 分类 英语新闻

Why Teflon Is Slippery? 1954年,法国工程师马克格雷瓜尔(Marc Gregoire)的妻子柯莱特(Colette)突发奇想,觉得丈夫用来涂在钓鱼线上防止打结的不粘材料特氟龙(Teflon)如果可以用在煎锅上,效果一定不错

发表于:2019-02-24 / 阅读(219) / 评论(0) 分类 英语听力文摘 English Digest
学英语单词
abdel-salem
acid-sugar ratio
Allardia glabra
amelioration of low productive paddy soils
an. ex.
bayndie fibre
beating apparatus
bedsitting room
billethead
break seal
calimanco
charlemont
chernyshevite (tschernichewite)
cicatrisant
clock ... up
coercive function
compiler directive statement
conchoids
contract of international sale of goods
corner-man
cross flow fan
culex (lutzia) fuscanus
cupro-lead
damages caused by the seller's fault
diphosgenism
don't trouble yourself
dummy specimen
electronic switching equipment
exchange control territory
exploiting
factual proof
family Phyllostomidae
fertilizer loader
fire diamond
follow-the-pointer dial
freezing pan
Fuck-It
grape-fruit
ground edge
Hematostiblite
in command
iodcarnallite
islamabads
ITFS
Laxans
Le Chasseron
leiaster speciosus
low-suction valve
luticolous
Manyara, Lake
mcnees
medical specialists
minerogenetic map
mixed admission
money-launderers
movement weight cable
multiblade fan
multiple-sway frame
one time password
orthomorphism
Palm rejection
phantasy world
physisorptions
preformation
rag scrap
refraction prisms
relationisms
ripens
roarers
Rothwesten
rubber hand lamp
seal limbs
self-imaging
set a term to
singaporensis
single tilting permanent magnetic chuck
six-toothed
sorting network
spray type cooling
square blocks
staying powers
sterba
storage battery meter
symbolic wiring diagram
Symplocos lancifolia
T-handle swinging socket wrench
teratoma of seminal vesicle
Theodosius I
thermal output coefficient
thymus epithelium
to be in line with
tricuspid teeth
turf swamp
undodgeable
unequal impulse
unregister
vaginal part of cervix
vasoepididymostomies
virtual memory address
Wellman-Galusha gasifier
white letter
YTTM