透镜的中性焦强

Our story today is called The Diamond Lens. It was written by Fitz-James O'Brien. We will tell the story in two parts. Now, here is Maurice Joyce with part one of The Diamond Lens. When I was ten years old, one of my older cousins gave me a microscop

发表于:2018-12-08 / 阅读(559) / 评论(0) 分类 2018年VOA慢速英语(二)月

Poverty Source of Tropical Infections in Texas, Gulf of Mexico Chagas is an infectious disease transmitted by the kissing bug. The kissing bug looks a little bit like a cockroach but it has the ability to feed on blood and it lives in the very poor q

发表于:2018-12-08 / 阅读(129) / 评论(0) 分类 VOA标准英语2012年(三月)

AMERICAN STORIES - Short Story: The Diamond Lens by Fitz-James O'Brien (Part 2) Now, the Special English program, AMERICAN STORIES. (MUSIC) Our story is called The Diamond Lens. It was written by Fitz-James O'Brien. Today we will hear the second and

发表于:2018-12-16 / 阅读(140) / 评论(0) 分类 2011年VOA慢速英语(六)月

中和抗体有望助力艾滋病疫苗研制 Researchers say powerful antibodies may hold clues to developing an effective AIDS vaccine.The antibodies were isolated from individuals already infected with HIV. Dr. Wayne Koff saysthe goal is to find a

发表于:2018-12-16 / 阅读(116) / 评论(0) 分类 VOA标准英语2016年(七月)

During his first term in office, Indonesian President Susilo Bambang Yudhoyono oversaw a period of robust economic growth based on exports. This year exports have slowed as a result of the global recession. As the president gets set to begin his seco

发表于:2018-12-19 / 阅读(153) / 评论(0) 分类 VOA双语新闻 2009年9月

Our story is called The Diamond Lens. It was written by Fitz-James O'Brien. Today we will hear the second and final part of the story. Here is Maurice Joyce with part two of The Diamond Lens. When I was a child, someone gave me a microscope. I spent

发表于:2019-01-03 / 阅读(392) / 评论(0) 分类 2018年VOA慢速英语(三)月

This is Scientific Americans 60-Second Science. Im Cynthia Graber. Thisll just take a minute. Heres a strange tale of two previously unrelated food products. First: chitlins, that delicacy of fried pig large intestines. Theyre well-loved throughout t

发表于:2019-01-08 / 阅读(149) / 评论(0) 分类 Scientific American(十一)月

Flu Virus Disarms Immune System's First Responders 流感病毒瓦解免疫系统的第一道防线 From VOA Learning English, this is the Health Report. 这里是美国之音慢速英语健康报道。 Infection by the influenza virus may be more co

发表于:2019-01-12 / 阅读(184) / 评论(0) 分类 2013年VOA慢速英语(十二)月

AMERICAN STORIES - Short Story: The Diamond Lens, Part 1, by Fitz-James O'Brien SHIRLEY GRIFFITH: Now, the Special English program, AMERICAN STORIES. (MUSIC) Our story today is called The Diamond Lens. It was written by Fitz-James O'Brien. We will te

发表于:2019-01-12 / 阅读(160) / 评论(0) 分类 2011年VOA慢速英语(六)月

AS IT IS 2015-03-05 UK Group Brings Eyeglasses to Rwanda 英国组织向卢旺达提供眼镜 Most people in developed countries do not have a problem getting prescription eyeglasses. They go to an ophthalmologist -- a trained specialist who treats p

发表于:2019-01-12 / 阅读(122) / 评论(0) 分类 2015年VOA慢速英语(三)月

Scientists Gather for AIDS Vaccine 2011 The largest conference on AIDS vaccine development is being held in Bangkok, Thailand FROM September 12th to the 15th. Researchers will discuss how to build on recent advances in a time of tight budgets. Organi

发表于:2019-01-13 / 阅读(122) / 评论(0) 分类 VOA标准英语2011年(九月)

New Yellow Fever Vaccine Shows Promise A new vaccine for yellow fever is showing good results in tests as it overcomes one of the biggest problems with the current version. Yellow fever is a deadly disease that occurs in much of South America and sub

发表于:2019-01-14 / 阅读(151) / 评论(0) 分类 VOA标准英语2011年(四月)

Potent Antibodies Offer New AIDS Vaccine Design Researchers say powerful antibodies may hold clues to developing an effective AIDS vaccine. The antibodies were isolated from individuals already infected with HIV. Dr. Wayne Koff says the goal is to fi

发表于:2019-01-14 / 阅读(141) / 评论(0) 分类 VOA标准英语2011年(八月)

UK Scientists Develop Cheap Adjustable Glasses 英国科学家开发廉价可调眼镜 Ninety-five percent of people in Sub-Saharan Africa who need glasses don't own a pair, according to the Britain-based charity foundation Vision for a Nation. Its f

发表于:2019-01-14 / 阅读(154) / 评论(0) 分类 VOA标准英语2015年(一月)

美国准备销毁叙利亚化学武器 The U.S. Defense Department is preparing to test a system it plans to use to destroy Syria's chemical weapons stockpiles at sea. Officials are offering reassurances that the process will be safe. 美国国防部正

发表于:2019-01-18 / 阅读(152) / 评论(0) 分类 VOA双语新闻 2013年12月

During his first term in office, Indonesian President Susilo Bambang Yudhoyono oversaw a period of robust economic growth based on exports. This year exports have slowed as a result of the global recession. As the president gets set to begin his sec

发表于:2019-01-31 / 阅读(127) / 评论(0) 分类 VOA标准英语2009年(九月)

You know I don't need you You know I don't need your hell If you going give me something Well give me something I can't give myself Oh, don't want your money Don't want your rolodex of friends Already have me a daddy Take a new picture for your portr

发表于:2019-02-09 / 阅读(242) / 评论(0) 分类 音乐咖啡厅

Israel has issued a stern warning after Iran said it had begun making a higher-grade nuclear fuel. Israeli Prime Minister Benjamin Netanyahu says Iran's intentions are clear. Iran is racing forward to produce nuclear weapons in brazen defiance of the

发表于:2019-02-12 / 阅读(147) / 评论(0) 分类 VOA标准英语2010年(二月)

Meanwhile the tireless Rutherford, now back at Cambridge as J. J. Thomson's successor as head of the Cavendish Laboratory, came up with a model that explained why the nuclei didn't blow up. He saw that they must be offset by some type of neutralizing

发表于:2019-02-17 / 阅读(148) / 评论(0) 分类 万物简史

When a virus enters your body, your body has to recognize it then produce a protein called an antibody. These antibodies attached to the virus and neutralize it. However, in the time it takes your body to produce enough antibodies, the virus may have

发表于:2019-02-23 / 阅读(118) / 评论(0) 分类 英语时差8,16
学英语单词
administrative machine
air-seasoning
archiacs
automatically shutting pressure of needle valve
Balmer limit
baud conversion
black-felt
bottle it
brachionus forficula
bunked off
Cabimas
carbon-burning load
chiarivari
chuds
clouterly
commercial paper payable
company lawyer
compounded lubricating oil
computer mediated communication
Conophytum
course up
cropland
cypris
depot phenomenon
desk clerk
Does the back door have a lock on it
double-stoppings
dry bulb economizer
electrochromic polymer
emotion-thought
ferriammonium chloride
filliped
genus lycaeons
gojira
grain complex
haemopoietic growth factors
have respect for
heat and humidity testing equipment
high line rig
hydroxyecdysone
ice-making machine
invar leveling rod
job-hunter
Karakulino
kazoo
kweller
lays aside
locomotive tractive force
lymphation
mail box base address
micropolar fluid
midtidal region
mirror magnetic field
net-sounder
nonfried
overrun
partial devaluation
perivincine
pitmann
placer contact phone number
polyallylmethacrylate
position-finder
presacral
primary record
primitive reaction
productive process
purchase capital
raisinettes
rajecki
reaction of beam
rebroadcasting
recurrence type
Rihand Dam
ring sth up
rocket staging
run mountain high
schmitz
semi-immersed liquid quenched fuse
Sesbania bispinosa
shea-oak
Shigella flexneri
social networking fatigue
splash-proof appliance
strand mill
taper saw
telemetry-frame rate
theoretical generalization
thesaurusi
thyssen krupp
toll pass ticket
Totebo
tweenage
two-step heat treatment
untunefully
varoom
venographies
vestel
virtual private servers
vitascopic
window ice
Wood ward speed governor
Yule log