挥发性有机化合物

This is the VOA Special English Development Report. Right now, the top story in AIDS research involves newly announced findings about adult male circumcision. Two studies in Africa found that circumci

发表于:2018-11-27 / 阅读(364) / 评论(0) 分类 2006年慢速英语(十二)月

By Mario Ritter Broadcast: July 8, 2003 This is Steve Ember with the VOA Special English Agriculture Report. Recently, a listener in Nigeria told us about an organization called World-Wide Opportuniti

发表于:2018-12-07 / 阅读(104) / 评论(0) 分类 VOA2003(下)-农业与经济

1. Parts of North Carolina all the way up to Massachusetts have been rattled by an earthquake. The 5.9-magnitude quake was centered in Virginia and has caused minor damage and some injuries. 2. Hundreds of Libyan rebels have stormed one of Muammar Ga

发表于:2018-12-15 / 阅读(130) / 评论(0) 分类 美联社新闻一分钟2011(八月)

This is Scientific Americans 60-Second Science. Im Steve Mirsky. Got a minute? Generations of American children have been told, Eat your broccoli! And for decades, researchers have known that broccoli and related vegetables like cauliflower and water

发表于:2018-12-24 / 阅读(95) / 评论(0) 分类 Scientific American(一)月

This is Scientific Americans 60 Second Science, I am Cynthia Graber, this will just take a minute. Compounds found in the herb thyme have antibiotic properties. Now scientists have demonstrated that thyme might have a future role in fighting acne. A

发表于:2018-12-24 / 阅读(131) / 评论(0) 分类 Scientific American(三)月

Ever wondered why mosquito eat some people up but leave others relatively unscathed. a new study find this prefential treament due to smells produced by the microscopic critters that cover our bodies. the reaserch is in the journal public library sci

发表于:2018-12-24 / 阅读(136) / 评论(0) 分类 Scientific American(一)月

Murchison Meteorite's Chemical Bonanza The 1969 Murchison meteorite was known to harbor complex organic compounds, but a new analysis in Proceedings of the National Academy of Sciences finds that it may also contain millions of chemicals and shed lig

发表于:2019-01-02 / 阅读(150) / 评论(0) 分类 60秒科学

The United States space agency says its Mars exploration vehicle has discovered chemical substances necessary for life. Scientists reported that NASAs Curiosity rover found large amounts of organic molecules in 3.5 billion-year-old rock in an area ca

发表于:2019-01-03 / 阅读(74) / 评论(0) 分类 2018年VOA慢速英语(六)月

Broadcast: Mar 17, 2003 Rain hits the 1) shingles on the large covered porch that leads up to David Masumoto's farmhouse. From the porch he can see 90-year-old 2) raisin 3) vineyards his family has te

发表于:2019-01-03 / 阅读(122) / 评论(0) 分类 VOA2003(上)-科技先知

This book stinks! is really a bad review. But even a classic work can start to smell when it gets old enough. Now chemists have developed a technique that identifies what kind of degradation process an old book or historical document is going through

发表于:2019-01-08 / 阅读(78) / 评论(0) 分类 Scientific American(十一)月

This is Scientific Americans 60-Second Science, Im Steve Mirsky. Got a minute? The 2010 Nobel Prize in Chemistry goes to the University of Delawares Richard Heck, Purdues Ei-ichi Negishi and Hokkaido Universitys Akira Suzuki for their work in develop

发表于:2019-01-08 / 阅读(108) / 评论(0) 分类 Scientific American(十)月

This is Scientific Americans 60-Second Science. Im Cynthia Graber. This will just take a minute. Wine can help keep conversation flowing at a dinner party. And now it looks like that wine may aid in materials science as well. Japanese researchers dis

发表于:2019-01-08 / 阅读(172) / 评论(0) 分类 Scientific American(三)月

今天我们要学的词是organic。 Organic, 有机的,绿色的。 Organic product, 有机产品。近年来,美国很多消费者开始崇尚绿色、有机食品。不过,统计数字显示, Organic food accounted for only 3.5% of the fo

发表于:2019-01-11 / 阅读(90) / 评论(0) 分类 英语每日一词

More Land Being Used for Organic Farming More land around the world is being dedicated to organic farming. The Worldwatch Institute says since 1999 theres been a more than three-fold increase to 37 million hectares. Organic farming is farming without

发表于:2019-01-13 / 阅读(85) / 评论(0) 分类 VOA标准英语2013年(一月)

Air pollution 空气污染 A: I've heard of ground-level ozone but can you explain what it is exactly? A:我听说近地面臭氧,但是你能确切解释一下是什么吗? B:Yes, it's one of the main air pollutants. Factories don't emit it dire

发表于:2019-01-14 / 阅读(78) / 评论(0) 分类 职业技术英语口语

Voice 1 Hello. Im Marina Santee. Voice 2 And Im Elizabeth Lickiss. Welcome to Spotlight. This programme uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice 1 Milk chocola

发表于:2019-01-19 / 阅读(80) / 评论(0) 分类 环球英语 Spotlight

Judging a Book by Its Odor A study in the journal Analytical Chemistry identifies various organic compounds that old books give off and that can be analyzed noninvasively, offering important clues to an historic work's condition and prognosis. Steve

发表于:2019-01-30 / 阅读(181) / 评论(0) 分类 60秒科学

AGRICULTURE REPORT - Compost: an Organic Way to Better Soil and Crops By Gary Garriott Broadcast: Tuesday, July 05, 2005 I'm Gwen Outen with the VOA Special English Agriculture Report. Many farmers im

发表于:2019-01-30 / 阅读(160) / 评论(0) 分类 农业与发展

Wildfires Spike Wine with Smoky Notes The fires that ripped across Napa and Sonoma last year damaged some two dozen wineries, and burned others completely to the ground. 去年发生在纳帕和索马诺的大火损毁了二十多家酒厂,并将其他

发表于:2019-02-13 / 阅读(80) / 评论(0) 分类 2018年科学美国人2月

Why is my verse so barren of new pride, 为什么我的诗缺乏点晴之笔, So far from variation or quick change? 行文沉闷呆板,千篇一律? Why with the time do I not glance aside 为什么我的诗不顺应时尚, To new-found meth

发表于:2019-02-24 / 阅读(158) / 评论(0) 分类 莎士比亚十四行诗全集
学英语单词
a pig in a poke
aleph-zero
always-on
amino groups
atmospheric radiochemistry
auxiliary jack
auxiliary steam supply system
bedim with
behind in one's payment
bioinvaders
branched knot
bread line
candle cotton wick
carposoma
clinker plating
code of best practice
composits
concealed piping
contact lenses
dailiest
Dalan Hural
deoxythymidine (T,dT)
depressor epiglottidis
docu-drama
dogwatches
download manager
eczematoid
edye
empales
endometriomas
exposure scale
foofooraw
frari
fuelcarrying
full rotation type
fur-bearing
house of worship
in vitro translation
ingress of groundwater
instantaneous electromotive force
insuavity
intermediate conversion
International association of Institutes of Navigation
ixodes spinipalpiss
jeols
Kolkasrags
lace and trimming machine
laughlan atoll
lie near the heart
lieblich
long-lok
microsatellite
multiple-purpost bridge
musculi splenius cervicis
ngamensis
orthoimage
peroxidisable
petit francois (saint-joseph)
phenolicresin cement
pitting attack
pollution from dumping
Poschiavo, V.di
prayere
presentiveness
provision hoy
PWTN
qima (kiyma)
Range forward
rbt
readers
reciprocal cross-section
recursive length
reference validation mechanism
repugnatory
rhamoxanthin
rhodocenium
Santiago Peak
scammonia Convolvulus
schpeal
scrub bird
Serie B
sketch-book
soakage
source of power supply
SPHAERIOIDEA
sphyranura oligorchis
squeeze the shorts
starkville
steyr
superconsciously
thousands of instructions per second
three-phase exciter
tight pick
total calculator system
transverse stabilizer bar
twenty-two rifles
universal magnetometer
vivien leighs
windshield anti-icer
witzell
word terminal synchronous
Yabims