人工淘汰

Recording technology has changed a lot over the years, but you can still do one essential thing. You sit in front of a microphone and you tell a story, which here we are again this Friday morning because it's time for StoryCorps. It's an oral history

发表于:2018-12-02 / 阅读(189) / 评论(0) 分类 2007年NPR美国国家公共电台

Scientists at the Massachusetts Institute of Technology (MIT) have created what could be a breakthrough in providing clean, alternative energy. Researchers have invented an artificial leaf that splits water into hydrogen and oxygen and stores the ene

发表于:2018-12-07 / 阅读(172) / 评论(0) 分类 创新英语

Researchers Create Artificial Skin With Sense of Touch Scientists have recently made considerable gains in creating human-like artificial limbs, but they still look and feel artificial. That could change with a development from South Korea. Researche

发表于:2018-12-16 / 阅读(97) / 评论(0) 分类 VOA标准英语2015年(一月)

California State Water Project says it will provide no water to the states residents and farmers this year. As NPRs Sam Sanders reports, it is the latest efforts to deal with the severe drought. At full capacity, the California State Water Project se

发表于:2018-12-17 / 阅读(82) / 评论(0) 分类 2014年NPR美国国家公共电台2月

SCOTT SIMON, HOST: When you talk to disease experts about what might alarm them, it's not Ebola or Zika. It's Nipah. It's as deadly as Ebola but attacks the brain, and it has the potential to spread by mere cough. As NPR's Michaeleen Doucleff reports

发表于:2018-12-17 / 阅读(110) / 评论(0) 分类 2017年NPR美国国家公共电台2月

Artificial Muscle Brings Back Blink A study in the Archives of Facial Plastic Surgery reports the development of an artificial muscle system that could restore the ability to blink to stroke and injury patients. Cynthia Graber reports Most of us blin

发表于:2019-01-02 / 阅读(220) / 评论(0) 分类 60秒科学

1. Hundreds of Iraqi police and army troops fanned out across Baghdad, setting up checkpoints and fortifying polling stations ahead of a historic constitutional referendum. 2. Thousands of birds wer

发表于:2019-01-08 / 阅读(161) / 评论(0) 分类 美联社新闻一分钟2005

AS IT IS 2015-04-25 Sierra Leone Dog Population Rising Because of Ebola Crisis 埃博拉导致塞拉利昂狗数量增加 The Ebola crisis in Sierra Leone has led to growing concern about another disease: rabies from wild dogs. Many owners fear their

发表于:2019-01-12 / 阅读(125) / 评论(0) 分类 2015年VOA慢速英语(四)月

Scientists at the Massachusetts Institute of Technology have turned to Mother Nature for inspiration, inventing a device that mimics photosynthesis, the process plants use to convert sunlight and water into usable energy. MIT chemistry professor Dani

发表于:2019-01-14 / 阅读(192) / 评论(0) 分类 VOA标准英语2011年(四月)

Scientists say they have successfully tested artificial blood vessels grown in the laboratory. In a heart bypass operation, surgeons typically remove a vein from a patient's leg and use it to replace blocked arteries that feed the muscles of the hear

发表于:2019-01-14 / 阅读(140) / 评论(0) 分类 VOA标准英语2011年(二月)

Camels are not usually associated with Australia, but Australia is home to the largest herd of feral camels in the world. About 12,000 dromedary camels were brought to Australia in the mid 19th century to carry people and supplies during the explorat

发表于:2019-01-22 / 阅读(152) / 评论(0) 分类 自然百科2009年

今天我们要学的词是 artificia。Artificial 人造的。artificial intelligence 人工智能。不久前,The FDA approved a new artificial retina device that would help some people regain part of their sight. 美国食品和药物管理局批准

发表于:2019-01-30 / 阅读(128) / 评论(0) 分类 英语单词荟萃

FAO Issues Avian Flu Warning 世界粮农组织发布禽流感警报 Avian flu continues to pose serious health threats to both human and animal health, especially as the flu season approaches. Thats the warning issued by the U.N. Food and Agricultur

发表于:2019-02-01 / 阅读(84) / 评论(0) 分类 VOA常速英语2013年(九月)

GUANGZHOU, Jan. 31 (Xinhua) -- The number of H7N9 human cases in south China's Guangdong Province reached 30 since the start of the year with two more cases reported, local health authorities said Saturday. A 48-year-old man from Jieyang City died on

发表于:2019-02-02 / 阅读(80) / 评论(0) 分类 英语新闻

South and Southeast Asian countries are grappling with new outbreaks of bird flu as winter weather sweeps across the region. The latest outbreaks are still confined primarily to poultry, but one new human death has been reported in Vietnam. 亚及东南

发表于:2019-02-06 / 阅读(101) / 评论(0) 分类 VOA双语新闻 2008年1月

By Tom Rivers London 13 November 2007 Authorities in Britain have ordered the culling of thousand of turkeys and other birds at a farm northeast of London where a deadly strain of avian flu has been detected. For VOA, Tom Rivers reports from the Brit

发表于:2019-02-08 / 阅读(100) / 评论(0) 分类 VOA常速英语2007年(十一月)

Artificial Speech Mimics Real Thing 合成声音发展渐入佳境 未来虚拟声音真假难辨 At a University of Arizona laboratory, Professor Brad Story analyzes the voices of singers, actors and public speakers both live and on audio tape. 在亚

发表于:2019-02-12 / 阅读(191) / 评论(0) 分类 VOA标准英语2011年(十一月)

While it may seem counterproductive for members of the same species to eat each other, cannibalism can promote the survival of the species as a whole by reducing competition, culling the weak, and bolstering the strong. 虽然对于同种族的成员来

发表于:2019-02-14 / 阅读(114) / 评论(0) 分类 留美老师带你每日说英文

Broadcast on COAST TO COAST: February 12, 2004 AA: I'm Avi Arditti with Rosanne Skirble, and this week on Wordmaster -- enough about politics, today we talk about love! RS: We were searching for a topic for Valentine's Day -- it's this Saturday, you

发表于:2019-02-16 / 阅读(109) / 评论(0) 分类 词汇大师(Wordmaster)

Bird flu has broken out on a poultry farm 200 kilometers to the south of Beijing. Authorities have closed off the area within a 3-kilometer radius of the farm in Baoding city, Hebei Province. Ning Hong reports on what other measures are being taken.

发表于:2019-02-18 / 阅读(132) / 评论(0) 分类 CCTV9英语新闻2013年12月
学英语单词
achilleas
afleme
age and area theory
air locked
air-intake system
Alula-Fartak Trench
amalinic acid
amplitude of convergence
audio-lingual materials
bulk-carrier
calandrinia ciliata dc.
caplow
chafing lip
colitoxicosis
colourizes
cotton-seed trees
Critesion jubatum
d'nel
destination resort
dhias
diameter of bolt hole
digit hexadecimal
donnybrook
drag polar
driver's test
ended in
environmentaltransition
euthatal
fait accompli
fat application
fidgetted
figurist
fixed reorder cycle systems
flageoletist
frumschaft
gastriode memory
give sb a ride
grasseriomycin
group control system
gruppetti
hagiwara
heat dissipating capacity
henry jamess
hidden damage
ibit
in an extremity
intermediary services
intermediate hosts
ixions
klesh
Lada
Lanczos algorithm
lantau island
laserwort
length of last sole
Lien Son
make percent
marine accident analysis
medium silt
meowers
minimum-cost estimating
mining manual
mishitting
musculus sacrococcygeus dorsalis
N (nano)
nAChR
Nectrieae
no live load
oligo-dT
omniscient
on-axis projection system
part music
pedagoguette
powerful radio-frequency cable
propargyl alcohol (propynol)
pseudomalletia taliensis
raster excitation
redus
refringent
rhamnopyranosyl
rib-sides
royal burgh
russian roulettes
saussage
Sch-indicators
self-sustainings
sex-linked disorders
shaping lathe
short-flame coal
spelter works
split-thickness free skingraft
tawi-tawi i.
teachers' institute
team work key
thorianites
Torosaurus
transpiratory
turbolift
unlabeled file
vendor selection
versamodular eurocard bus
water caltrop