[化] 氯化铝烷基化法

[00:00.00]在线英语听力室( www.tingroom.com )友情制作 [00:03.61]2001 Passage1 [00:11.16]Specialisation can be seen as a response to the problem [00:14.87]of an increasing accumulation of scientific knowledge. [00:19.40]By splitting up the subject mat

发表于:2018-12-01 / 阅读(243) / 评论(0) 分类 历年考研英语阅读理解

In the first two ESL lessons (BEP 59 BEP 60) in this three-part series on persuasion, we saw how getting your audiences attention and demonstrating a clear need were essential to the persuasive process. We learned that in the indirect method of persu

发表于:2018-12-05 / 阅读(269) / 评论(0) 分类 商务英语演讲课

New Solar Cell Minimizes Environmental Risks in Manufacturing Process 新的太阳能电池减少生产中对环境的危害 Scientists in England report the development of a new solar cell that minimizes environmental risks in the manufacturing proc

发表于:2018-12-08 / 阅读(222) / 评论(0) 分类 VOA标准英语2014年(六月)

This is the VOA Special English Development Report. Researchers say they have found a way to extend the storage life of a drug used to treat H.I.V. Their work could give infected mothers in the developing world a new way to prevent the spread of the

发表于:2018-12-16 / 阅读(179) / 评论(0) 分类 2010年VOA慢速英语(五)月

New Documentary Explores Aluminum's 'Dark Side' Aluminum is everywhere, including in products that make us feel better, safer and cleaner. Like antacids, sunscreen and antiperspirants. But Austrian filmmaker Bert Ehgartner says theres another side to

发表于:2018-12-16 / 阅读(190) / 评论(0) 分类 VOA标准英语2013年(五月)

South Korean officials are reacting carefully to the expected suspension of large U.S.-South Korea military exercises. An announcement could come this week to suspend the major joint military exercises, South Koreas Yonhap news agency reports. Those

发表于:2019-01-03 / 阅读(190) / 评论(0) 分类 2018年VOA慢速英语(六)月

By Jim Teeple Jerusalem 17 December 2007 After seven years, Israeli and Palestinian negotiators are talking once again. That development came at the end of 2007, a year of turmoil and transition which saw the Palestinian territories split, politicall

发表于:2019-01-07 / 阅读(322) / 评论(0) 分类 VOA常速英语2007年(十二月)

By Naomi Schwarz Dakar 21 December 2007 Rebels and government troops in Ivory Coast are set to begin the long-awaited disarmament process on Saturday, a critical first step before forming a new national army is the divided country. Ivory Coast Presid

发表于:2019-01-07 / 阅读(259) / 评论(0) 分类 VOA常速英语2007年(十二月)

AS IT IS 2016-05-23 Former Vietnamese Refugees Find Success in US 一越南难民在美国取得成功 David Duong and his family were rescued at sea after fleeing Vietnam in a small boat at the end of the Vietnam war. We almost, you know, died in th

发表于:2019-01-12 / 阅读(167) / 评论(0) 分类 2016年VOA慢速英语(五)月

Several accords signed to boost relations between Turkey and Cameroon Ntaryike Devine, Jr. | Yaounde, Cameroon 17 March 2010 It was the first trip to Africa for the Turkish president, who arrived in Cameroon yesterday accompanied by 120 businessmen,

发表于:2019-01-13 / 阅读(190) / 评论(0) 分类 VOA标准英语2010年(三月)

AUDIE CORNISH, HOST: The White House is postponing most of its steel and aluminum tariffs for at least another month. Tariffs were due to kick on - to kick in on a number of countries at midnight tonight. They're part of a broader effort to crack dow

发表于:2019-01-16 / 阅读(304) / 评论(0) 分类 2018年NPR美国国家公共电台5月

DAVID GREENE, HOST: A lot of the aluminum and steel we use here in the United States is imported from other countries. And that, according to a report from the Commerce Department, is a threat to national security. Last week, department officials rec

发表于:2019-01-16 / 阅读(221) / 评论(0) 分类 2018年NPR美国国家公共电台2月

DAVID GREENE, HOST: Families across the United States are fighting with the federal government over a deadly chemical. Dozens of people have died from inhaling methylene chloride. This is an ingredient in common paint removers. NPR's Rebecca Hersher

发表于:2019-01-17 / 阅读(225) / 评论(0) 分类 2018年NPR美国国家公共电台11月

Every winter some twenty million tons of salt are dumped on America's road.That sodium chloride melts the ice, so it prevents its formatin, helping to prevent accidents. But road salt has its downside. This is not very economical because salt is main

发表于:2019-01-20 / 阅读(278) / 评论(0) 分类 2016年Scientific American(一)月

This week on Why Tell Me Why, we are finding out why the oceans are so salty. So the oceans are salty because the oceans have been around, lets say, for over five hundred million years. And over the course of time what we found out is that weve alway

发表于:2019-01-22 / 阅读(214) / 评论(0) 分类 自然百科2009年

戴维斯大使对六方会谈的看法 The purpose of the Six-Party process is to denuclearize the Korean Peninsula, which in effect means that North Korea needs to move forward to denuclearize, not go in the other direction, which is what theyve be

发表于:2019-02-01 / 阅读(179) / 评论(0) 分类 VOA常速英语2013年(九月)

Tony: Who did you invite over for dinner Saturday? Carmela: I invited Keith, Sung, Stephanie, and Luis. Tony: You didnt! Carmela: I did. Why? Tony: Youre going to have a hard time cooking for them. Keith is a vegan and only eats food thats organic. S

发表于:2019-02-04 / 阅读(200) / 评论(0) 分类 地道美语播客

U.S. retail sales fell half a percent in June providing more evidence that the U.S. economic recovery will slow down in the second half of the year. But the weaker than expected consumer spending appeared to have little impact on Wall Street as inves

发表于:2019-02-05 / 阅读(202) / 评论(0) 分类 VOA标准英语2010年(七)月

By Challiss McDonough Cairo 11 March 2008 Many Arabs say recent violence in Gaza and Israel is placing the Middle East peace process in jeopardy again. VOA Middle East Correspondent Challiss McDonough reports from Cairo the process is under review ah

发表于:2019-02-08 / 阅读(257) / 评论(0) 分类 VOA标准英语2008年(三月)

First off, I'll mention that at the bottom of the sea there exist veins of zinc, iron, silver, and gold whose mining would quite certainly be feasible. 首先,我对您说,海底有锌、铁、银、金等矿藏,开发并不是不可能的事。

发表于:2019-02-25 / 阅读(362) / 评论(0) 分类 《海底两万里》中英双语有声读物
学英语单词
acidulanting agent
alepole
Argences
arterio-venography
atomic hydrogen arc welding
atyids
be soppy on
beefsteak fungus
Bergenfield
Bergschenhoek
BL minimum charge
callback pay
can count
cephalothoracopagus disymmetros
clinid fish
continuous underpinning
corrosion testing of lubricating
crank extension
crustie
cyclic condensation
dagel
dawr
disjoint data set name
dog-fighting
dry cleaning solvent
Duisdorf
early reaction
elastic creep recovery
employee incentive
enspell
epitimesis
ergonomic mouse
eucommioside
extensible canopy
extract of podophyllum
factorial primes
garca
heartseeds
heighday
hippopotomonstrosesquippedaliophobia
horizontal cross brace
ignorance logic
informed on
inger
j.g.
kasza
kenneys
key module
L-dihydroxyphenylalanine
Leermens
lose countenance
low pressure center
low-expansion
manno
marine towage
meander terrace
microcationic titration
microperthite
misexplanations
Morinda officinalis
multiplexing class
Nesselröden
network scanning
ninjo
noncitizenship
oligoplasmatic
on earth
oncophorus wahlenbergii longisetus
ormeloxifene
paulis
perithecicole
photobomb
pittosporad
positive pedestal voltage
predestinative
prolate cycloids
Ramses IV
rewiping
rubber carpet
running stability
scale sth down
seismic cable
sheading
Shikine-jima
sing-kwa
single chamber liquid rocket engine
solubility curve
Sub fin. coct.
supertravels
surface layer of subgrade
tagged word
take precautionary measures against ...
tipless
top casting process
triplicate-ternate
Virginia chain fern
Virsbo
Waltair
warp pattern
waveform interference
worm pipe