【有机化学】N—乙基—5—苯基异𪤆唑𪧀—3’—磺酸盐

Abby: hi, my name's Abby. What's your name? Colin: I'm colin. It's nice to meet you. What do you do? A: I'm a freelance English teacher. How about you? C: I'm in between jobs at the moment. A: what kind of job are you looking for? C: I'd like to find

发表于:2018-11-30 / 阅读(187) / 评论(0) 分类 生活英语情景口语

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(175) / 评论(0) 分类 2014年VOA慢速英语(五)月

Many of the Burgess specimens have now been assigned to living phyla just where Walcott put them in the first place. 许多布尔吉斯标本现在已经归到活着的动物的门里就是沃尔科特最初放置它们的地方。 Hallucigenia and s

发表于:2018-12-18 / 阅读(149) / 评论(0) 分类 万物简史

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(127) / 评论(0) 分类 VOA双语新闻 2014年1月

This is Scientific Americans 60-Second Science. Im Steve Mirsky. Got a minute? To keep your car purring, you have to change the oil. Such maintenance produces eight billion gallons of used motor oil annually. Some waste oil does get re-refined to pro

发表于:2018-12-24 / 阅读(120) / 评论(0) 分类 Scientific American(三)月

Fun Fact: Alligators Can Regrow Teeth 有趣的事实:短嘴鳄可以再长牙齿 Fun fact about alligators: they can regrow any of their eighty teeth up to fifty times. Which is pretty impressive, especially compared to us relatively dentally chal

发表于:2018-12-28 / 阅读(95) / 评论(0) 分类 初学者听力文摘精选

This is Scientific American's 60-Second Science. I am Steve Mirsky.Got a minute? Talk about your vicious cycles. A new study finds that belly fat could be making you hungrier. Which would lead to more belly fat. The research was performed at the Univ

发表于:2019-01-08 / 阅读(138) / 评论(0) 分类 Scientific American(四)月

Algae seem harmless enough. These precursors to plants thrive throughout the world's waters. But these single-celled plants have global consequences. We can thank them for oxygen in the atmosphere, oil in the lithosphere as well as dead zones in the

发表于:2019-01-08 / 阅读(141) / 评论(0) 分类 Scientific American(十一)月

An ass and an ox,fastened to the same yoke,were draging a waggon.While the ox was pulling with all his might he he broke a horn.The ass swore that he had got no help whatever from his weak companion.Exerting himself in the labour,the ox b

发表于:2019-01-09 / 阅读(200) / 评论(0) 分类 趣味英语

U.S. Vice President Joe Biden says he is withholding judgment on Iran's presidential election, as protests continue in Tehran over election results showing a landslide re-election victory for President Mahmoud Ahmadinejad. Vice President Joe Biden,

发表于:2019-01-13 / 阅读(156) / 评论(0) 分类 VOA标准英语2009年(六月)

By Sean Maroney Islamabad 28 September 2009 The head coordinator for the U.N. Humanitarian Affairs office in Pakistan says his agency is ready to handle what is expected to be a large number of families fleeing the South Waziristan tribal region as

发表于:2019-01-13 / 阅读(156) / 评论(0) 分类 VOA标准英语2009年(九月)

Azaz Residents Pick Up After Aerial Bombings The residents of Azaz clean up and mourn after Wednesday's deadly bombing by Syrian government warplanes. Azaz had been peaceful in recent months, although forces of the rebel Free Syrian Army have had to

发表于:2019-01-13 / 阅读(144) / 评论(0) 分类 VOA标准英语2012年(八月)

BBC Learning English Weekender Body image survey results Amber:Hello, I'm Amber, and youre listening to bbclearningenglish.com. In Weekender today, we listen to a report about a BBC survey of 25,000 young British people, asking about their body imag

发表于:2019-01-16 / 阅读(186) / 评论(0) 分类 Weekender

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(103) / 评论(0) 分类 白领英语晨读

WASHINGTON, Aug. 4 (Xinhua) -- Researchers have found a way to turn mouse embryonic stem cells into sperm and this finding opens up new avenues for infertility research and treatment, according to astudy published Thursday in the online edition of jo

发表于:2019-02-04 / 阅读(268) / 评论(0) 分类 英语新闻

By Scott Bobb Lisbon 10 December 2007 The Africa-European Union summit ended Sunday in Portugal with agreement on many global challenges but with differences on other key issues. Correspondent Scott Bobb has this report from Lisbon. European and Afri

发表于:2019-02-07 / 阅读(175) / 评论(0) 分类 VOA常速英语2007年(十二月)

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(126) / 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(141) / 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(139) / 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(155) / 评论(0) 分类 TED演讲教育篇
学英语单词
A bad beginning makes a bad ending.
abnormal taste
acre inches
admping ratio
anarcho-capitalists
antitherapy
apolar interaction
band roughing mill
band-tailed antshrike
base dimension
black patches
books audit
browntail
building sheet
cherry farm
cholelithes
chungdienensis
classical compact simple Lie group
cleavabilities
continental wind
control experiments
debittreing yeast
drainage point
edge disturbance
endomycopsis
factory service cost
far-field spectra
fixed length integer
flower boxes
forstay
fubsy
furoquinoline alkaloid
geo-synchronous satellite
good result efficacy
Grammys
growing space
heat responsive element
hook tap
hyperhistidinurja
ichthyodorylite
illiberis horni
immigrant's remittance
incarial bone
intact ship
intersegment reference
isocotylous
isothermal compression
knowledge exchange
laminar sublayer
langkawi
laterialis (tricostaeptera) shirozui
linear inequality constraint
lollipop men
Mason jars
matched condition
Melbournian
member carrier
micro-dictionary
Mikulicz's aphthae
Neocyanite
now-then
out-of-hours
platelet factor 2
political terrorist
positive semidefinite form
Prachuap Khiri Khan
price level changes
Rapanea linearis
reaction space
rivermont
rubber plastizing agent
Saint-Simonist
screw feed mechanism
shalcrosses
shrimp with lobster sauce
sizzlings
solid solution cermet
sopher
special gas
spring shackle
spurious copy
Starobyn
statement interlude
statutory rights
suez surcharge
support hours
symmetry error
tagus rivers
target area survey base
thiopentone
Thomson effect
three-state device
tracheid cells
vaik
wahaya
Waterhen L.
Wedensky phenomenon
weekers
xenon(iii) fluoride
xyrophilic
yellow water flag
Zwenkau