na. 化合物
[网络] 化学化合物;化学组成

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(455) / 评论(0) 分类 2006年慢速英语(十二)月

Could there be a substance that both gives us the munchies and can help combat obesity? There may indeed be, according to research published in the Proceedings of the National Academy of Sciences. The Monell Center in Pennsylvania partnered with Kyus

发表于:2018-12-02 / 阅读(142) / 评论(0) 分类 Scientific American(十二)月

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(182) / 评论(0) 分类 美联社新闻一分钟2011(八月)

Honeybee stings are painful. But they're also fragrant. If a beekeeper gets stung by bees, it smells like banana. Dr. Stefan D?tterl, a plant ecologist at the University of Salzburg in Austria. That banana scent, he says, is a compound called isoamyl

发表于:2018-12-24 / 阅读(141) / 评论(0) 分类 2016年Scientific American(十)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(145) / 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(209) / 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(196) / 评论(0) 分类 Scientific American(一)月

This is Scientific Americans 60-Second Science. Im Cynthia Graber. This will just take a minute. Take a deep breath. Taste anything? Actually, your lungs may, because scientists have discovered that the same receptors that exist on the tongue to tast

发表于:2018-12-24 / 阅读(140) / 评论(0) 分类 Scientific American(十)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(211) / 评论(0) 分类 60秒科学

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(129) / 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(168) / 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(229) / 评论(0) 分类 Scientific American(三)月

Coffee is one of the world's most widely-enjoyed beverages. Flavor aside, scientists have recognized it as a complex blend of chemical compounds with potential health effects, both good and bad. Now, new research suggests that if you drink enough cof

发表于:2019-01-13 / 阅读(117) / 评论(0) 分类 VOA标准英语2010年(七)月

AA: I'm Avi Arditti. Rosanne Skirble is away, but joining me from Los Angeles is English teacher Lida Baker to explain our topic on Wordmaster this week. It's a feature of the language called compounding. LIDA BAKER: Compounding is when we take two w

发表于:2019-01-18 / 阅读(109) / 评论(0) 分类 英语单词大师-Word Master

Chemical Rush Brian Mcfadden Chess game, Im the pawn Youre the queen, Im the throne Take me out tonight Make your move, pick and choose Anywhere Im gonna lose Give it to me black or white Feel it coming on Like a pulse in my head Sending chills right

发表于:2019-02-07 / 阅读(151) / 评论(0) 分类 好听的英文歌曲

AA: I'm Avi Arditti. Rosanne Skirble is away, but joining me from Los Angeles is English teacher Lida Baker to explain our topic on Wordmaster this week. It's a feature of the language called compounding. LIDA BAKER: Compounding is when we take two w

发表于:2019-02-14 / 阅读(108) / 评论(0) 分类 英语单词大师-Word Master

音乐+爱情的化学反应:Chemical Rush Artist:Brian Mcfadden Song:Chemical Rush Chess game, Im the pawn Youre the queen, Im the throne Take me out tonight Make your move, pick and choose Anywhere Im gonna lose Give it to me black or white F

发表于:2019-02-17 / 阅读(162) / 评论(0) 分类 流行英文歌曲

进行英语面试时,面试官会问到,你为什么觉得你胜任这项工作。那么你的回答就要让面试官相信你能把这份工作做好。本文列出了一些常见的问题和回答,仅供参考。 I (Interviewer 面试者) A

发表于:2019-02-18 / 阅读(185) / 评论(0) 分类 实用英语

音乐+爱情的化学反应:Chemical Rush 还是Brian Mcfadden小编对BB的新专辑实在不能不执着啊~这首依旧是混杂了电子风的Chemical Rush,稍微有些中规中矩,和专辑中电音味道更重的歌比起来,有些收敛

发表于:2019-02-18 / 阅读(172) / 评论(0) 分类 英文摇滚歌曲

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(213) / 评论(0) 分类 莎士比亚十四行诗全集
学英语单词
-itol
airworthiness
all drop
Americani
anchor is aweigh
anechoic chamber
antilatitudinarian
arrasene
B tree
bacterial slant
barsalou
bayard alpert gage
be struck with awe
benzown
bikercise
billitons
braking method
Bristab
brushmakers
cellulose lacquers
centesimal grade
compactification of a topological space
customance
decay lag
diathetic
dissolved state
diverted flow
Doppler point positioning
drop rod
eagless
engraved scale thermometer
etched-permalloy toroid memory
expansion valve
fault-responses
fidget with
fireheart
fluoro-tantalum-complex
frequency-modulated laser
garrincha
general light and power distribution
gray cloth
gyro dynamics
hambali
hardware trace mode
hiemilfruticeta
huntsmen
HXGA
hyperchannels
I-cell disease
immunocomplexes
intensity-height distribution
International Union of Pure and Applied Chemistry
l'isle
lakenheaths
lattice displacement
life-span
lobe-finned fish
loblollying
Mepipenicycline
mesophora tryoni
methyl ricinoleate
mobile ground station
morphophysiology
Narcomedusae
nootch
odor compound
ordinary
osmose
out-peeping
outrayious
oversight of markets
palaeothermometers
penwipers
plug compatible memory
pranotherapist
premature labor
rate of tidal current
red clause credit
reserves energy
rhombohedral hemimorphic-hemihedral class
rice borer
ring type filling
rose robin
seaway-induced load
significant anomaly
sordidous
Spence shale
spherocytic jaundice
suap-close
superstrains
thaw(ing)
token-replacement
trundled out
tylee
ungrammaticality
vectiss
vein of labyrinth
vertical-force
Vridi
wave paddle
wheat-growing
WYWH