氯化四乙(基)铵

AS IT IS 2014-05-25 Scientists Search for New Ways to Stop Mosquitoes 科学家们寻找新的方法来对付蚊子 The sound of a mosquito can mean trouble in many parts of the world. The bite of a mosquito can be deadly. Today, we will hear about s

发表于:2018-12-08 / 阅读(131) / 评论(0) 分类 2014年VOA慢速英语(五)月

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(99) / 评论(0) 分类 VOA标准英语2014年(六月)

In business, Optus has called for Telstra's proposals on its participation in the national broadband network to be blocked. Optus' chief executive Paul O'Sullivan says Telstra's current plan for the separation of its retail and wholesale arms wholesa

发表于:2018-12-11 / 阅读(102) / 评论(0) 分类 澳洲ABC新闻快递2011年

美科学家研发新一代驱蚊剂 In many regions of the world, mosquitoes are a seasonal pest. In other regions, they carry serious diseases like malaria. The World Health Organization estimates that almost 630,000 people died of malaria-related

发表于:2018-12-19 / 阅读(89) / 评论(0) 分类 VOA双语新闻 2014年1月

This is Scientific American Sixty Seconds Science, I'm Sophie Bushwick, got a minute? When Mexican tetra fish moved into darker caves long ago, they evolved to deal with the dark by becoming albino and going blind. A new research shows that the chang

发表于:2018-12-24 / 阅读(112) / 评论(0) 分类 Scientific American(一)月

T Tanshinone IIA 丹参酮IIA Tanshinone I 丹参酮I Tanshinone IIB 丹参酮IIB Taraxasterol 蒲公英甾醇 Taraxerol 蒲公英赛醇 Tauro ursodesoxy cholic acid 牛磺熊去氧胆酸 Taxifolin 花旗

发表于:2019-01-03 / 阅读(97) / 评论(0) 分类 医务英语

Promising Mosquito Repellent Announced美科学家研发新一代驱蚊剂 In many regions of the world, mosquitoes are a seasonal pest. In other regions, they carry serious diseases like malaria. The World Health Organization estimates that almost 6

发表于:2019-01-14 / 阅读(84) / 评论(0) 分类 VOA标准英语2014年(一月)

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(87) / 评论(0) 分类 2018年NPR美国国家公共电台11月

One Police stops on police vehicle outside one Victoria's Bar. After the preparation, as necessary arrests?, this liquor drive slightly mixes. Suddenly he sees to have a young people shakely goes out from bar, spend the many figures only then finds

发表于:2019-01-17 / 阅读(62) / 评论(0) 分类 白领英语晨读

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(138) / 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(99) / 评论(0) 分类 自然百科2009年

AGRICULTURE REPORT – March 12, 2002: Carbon Dioxide and Crops By George Grow This is the VOA Special English AGRICULTURE REPORT. Increasing levels of carbon dioxide gas in Earth’s atmosphere have

发表于:2019-01-30 / 阅读(112) / 评论(0) 分类 农业与发展

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(88) / 评论(0) 分类 地道美语播客

On its website, a history of the company makes no mention of leador indeed of Thomas Midgleybut simply refers to the original product as containing a certain combination of chemicals. 在它的网站上,公司的历史没有提及铅──也没有提

发表于:2019-02-17 / 阅读(88) / 评论(0) 分类 万物简史

By counting back through these layers and measuring the amount of lead in each, he could work out global lead concentrations at any time for hundreds, or even thousands, of years. The notion became the foundation of ice core studies, on which much mo

发表于:2019-02-17 / 阅读(103) / 评论(0) 分类 万物简史

Lead is a neurotoxin. Get too much of it and you can irreparably damage the brain and central nervous system. Among the many symptoms associated with overexposure are blindness, insomnia, kidney failure, hearing loss, cancer, palsies, and convulsions

发表于:2019-02-17 / 阅读(96) / 评论(0) 分类 万物简史

10 Getting The Lead Out 第十章 把铅撵出去 In the late 1940s, a graduate student at the University of Chicago named Clair Patterson (who was, first name notwithstanding, an Iowa farm boy by origin) was using a new method of lead isotope measur

发表于:2019-02-17 / 阅读(120) / 评论(0) 分类 万物简史

If you were going to a restaurant and wanted a healthier option, 如果你去饭店,你想吃得健康一点, which would you choose, grilled or fried chicken? 你会选择哪种食品呢,烤鸡还是炸鸡? Now most people would answer grill

发表于:2019-02-21 / 阅读(116) / 评论(0) 分类 TED演讲教育篇

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(166) / 评论(0) 分类 《海底两万里》中英双语有声读物
学英语单词
a lie made out of whole cloth
alterated
amniotic egg
angulus anterior pyramidis
ANOV
antibank movement
armor-piercing rocket
arteria interossea dorsalis
axially expansive seal
bafa golu
barley milling machine
batice
binocular colour mixing
biological treatment process
bracket product
brief acceleration
bromize
Bu I.
burst pedestal
Calycanthus floridus
Cin-Quin
clicher
connector in AND/OR graph
coonhound paralysis
Corso-Ligurian Basin
dare-to-die corps
Deer Creek
dendrobatid
dermatitis bullosa
diffused isolation
double margined door
enbucrilate
Eumops
Far East Time
Felege Birhan
ferdinand de lessepss
forehearth operator
Gastrodiscoides
Geoffrey II
gerras
hard black
hopfest
hyaline leucocyte
hydrocarbylenes
hyperuricacidemia
imprest fund application
in the same oven
infression
intermediate-coupling theory
jaloes
karey
karst phenomenon
leafsheath
low load operation
lungoute
make to do sth
marine weather observation
mus poschiavinus
muys
Muzaffarnagar
natica undulata
naturally raised
Nd-in glass
nitrites
nondeniable
nunclon
Osmunda regalis L.
outweirded
ovarian follicle
over-cheaply
partition fan
per segment
phenocrysts (phenocrystal)
phoenicurus leucocephalus
physical requirements
Pyrola shanxiensis
quadrinucleate cell
reflow oven
reproducting area
rheoviscometer
round-punched sheet
Rundstedt, Karl Rudolf Gerd von
servowriting
shower rooms
sipuncular
solid matte
standing derrick
state-driven
stem fibre
tanbark coppice
texas-barbecue
the academic year
the Canaries
tonicity
transanally
transfer of economic crisis
tryp sin
unhysterically
veining
volatile storages
Wuma
zincification