[有机化学] 有机合成化学

Autobiography of Nobel Prize Winner: Jean-Marie Lehn I was born on September 30 1939 in Rosheim, a small medieval city of Alsace in France. My father, Pierre Lehn, then a baker, was very interested in

发表于:2018-12-05 / 阅读(115) / 评论(0) 分类 英语沙龙2004全年合辑下

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(135) / 评论(0) 分类 VOA2003(下)-农业与经济

Blended Organic-Conventional Farming Could Feed World In rural Maryland, an hour-and-a-half drive from Washington, Bill Mason is tilling his fields to plant organic maize and soybeans. About two-thirds of his 340 hectares are organic, but not all of

发表于:2018-12-08 / 阅读(136) / 评论(0) 分类 VOA标准英语2012年(六月)

Sam: Now our count it down to Earth Day. We are showing you how to green in every aspect of your life, how to go green. And we are kicking off this series this morning with Deirdre Imus, the author of Growing Up Green!---Baby and Child Care. Now her

发表于:2018-12-11 / 阅读(90) / 评论(0) 分类 访谈录2008

1. What's your major in college? 你的专业是什么? 2. What did you major in? 你的专业是什么? 3. What are you majoring in? 你的专业是什么? 4. Why are you so interested in English? 为什么你对英语那么感兴趣? 5. I t

发表于:2018-12-25 / 阅读(147) / 评论(0) 分类 面试口语脱口而出

There is nothing like the suggestion of a cancer risk to scare a parent, especially one of the over-educated, eco-conscious type. So you can imagine the reaction when a recent USA Today investigation of air quality around the nation's schools singled

发表于:2018-12-27 / 阅读(150) / 评论(0) 分类 英语听力小短文走遍全世界

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(191) / 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(110) / 评论(0) 分类 2018年VOA慢速英语(六)月

As It Is - Remember Your Chemistry Classes? An international team of researchers recently reported creation of a new element that is 40 percent heavier than lead. The researchers successfully developed what they are calling Element Number 117 at a la

发表于:2019-01-03 / 阅读(148) / 评论(0) 分类 2014年VOA慢速英语(八)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(159) / 评论(0) 分类 VOA2003(上)-科技先知

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(126) / 评论(0) 分类 英语每日一词

AGRICULTURE REPORT - Study Points to Risk in Common Method of Enriching Soil By Jerilyn Watson / Broadcast: Mon, 12 Nov 2007 16:00:00 UTC This is the VOA Special English Agriculture Report. For more than half a century, many farmers worldwide have a

发表于:2019-01-11 / 阅读(137) / 评论(0) 分类 VOA慢速英语2007年(十一)月

AS IT IS 2016-10-05 Nobel in Chemistry Goes to Makers of Worlds Smallest Machines 2016诺贝尔化学奖:世界上最小的机器 Three scientists have won the Nobel Prize in Chemistry for their work in developing tiny machines. The three men are Jea

发表于:2019-01-12 / 阅读(125) / 评论(0) 分类 2016年VOA慢速英语(十)月

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(127) / 评论(0) 分类 VOA标准英语2013年(一月)

Having the opportunity to take on a diverse range of classes such as economics and chemistry along with her music studies is the perfect combination for Diane. Marsha James | Washington DC 10 August 2010 Oberlin Conservatory of Music Student Diane Ly

发表于:2019-01-13 / 阅读(140) / 评论(0) 分类 VOA标准英语2010年(八)月

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(115) / 评论(0) 分类 环球英语 Spotlight

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(198) / 评论(0) 分类 农业与发展

By Tom Rivers London 07 October 2009 Ada Yonath (file photo) Two Americans and one Israeli share this year's Nobel Prize in Chemistry for their work showing how the DNA code is translated into life itself. Americans Venkatraman Ramakrishnan and Thom

发表于:2019-02-03 / 阅读(127) / 评论(0) 分类 VOA标准英语2009年(十月)

By Kevin Billinghurst Stockholm 10 October 2007 The 2007 Nobel Prize for Chemistry has been awarded to Gerhard Ertl of the Max Planck Society in Berlin. Kevin Billinghurst has the story from Stockholm. The Royal Swedish Academy of Sciences honors Pr

发表于:2019-02-04 / 阅读(140) / 评论(0) 分类 2007年VOA常速英语(十月)

The Organic Foods Are organically grown foods the best food choices? The advantages claimed for such foods over conventionally grown and marketed food products are now being debated. Advocates of organic foods -- a term whose meaning varies greatly -

发表于:2019-02-25 / 阅读(97) / 评论(0) 分类 双语有声阅读
学英语单词
A sharp
alleys
annual receipts arid outlays
apparent colour
attendable
Battle Ground
bayonet gage
beholden to
Bluetooth phone
Braives
british shillings
burring die
centrolineal
cercospora tectonae
cimex
classical school
clinical-evaluation
compromisations
concrete jungle
correspondence-
cosmic-ray guard
courtesy phones
cristofani
decipherers
detached block
diazoketone
dirct readout infrared radiometer (drir)
disinfectable
double-cutaway
drunk tanks
efficiency for charge-discharge
electro-magnetic compatibility (emc)
electron tunnelling
electroplexy
excitation trigger
financial revolution
General Alvear
ground water plane
headquartering
herdell
hog maws
hufe
hypograms
improvatory
in the distant future
insulin resistance
interbrain (or twixt brain)
iroks
jointedness
juab
laser probability
lechered
lettres on dancing and ballets
liquefied cohesionless-particle flow
lure
Master Cube
megateches
meta-isomers
metylophorus nebulosus
minkes
mos'
multispeed
N,4-acetylsulfanilamide
nutraceutical
objective glass
onykia loennbergi
open-topper
parathyroid tetany
pat slide
pattern recognition method
pentetic acid
plunger packing
positive-pressure
postmitochondrial
preglacial valley
provender mill
Périgne
rebaptizer
refereeship
reflection-type kinescope
restriving
retinopathy of prematurity syndrome
rhachipagus
scuff mark
siltcoos
sorting
special piece
springboks
spur dike
stands out
steam air forging hammer
syb
tarras
tear out
temporal logic specification
tetranitrodiphenyl ether
thermal blooming spectroscopy
three dimensional microstructure
tied-down
U/PCR
winter day
yek-