[化] 四乙铅

FAITH LAPIDUS: And Im Faith Lapidus with EXPLORATIONS in VOA Special English. Today we enter a world of Christmas magic, snowflakes, sweets and sugarplum fairies. The Nutcracker is one of the most popular ballets in the world. It is also an important

发表于:2018-12-01 / 阅读(173) / 评论(0) 分类 2010年VOA慢速英语(十二)月

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(114) / 评论(0) 分类 2014年VOA慢速英语(五)月

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(79) / 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(102) / 评论(0) 分类 Scientific American(一)月

歌词如下: Sweet plum blossoms fine and whate. Did you open in the night? Yestoday the tree was bare. Now it's covered everywhere! One and two and three and four. I can't count how many more!

发表于:2018-12-31 / 阅读(92) / 评论(0) 分类 英语儿歌274首

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(89) / 评论(0) 分类 医务英语

本文写到四种常见的水果,你可能也很爱吃。你对它们的了解足够多吗?快来多了解一些它们在英语中的内涵吧! 1. grape 葡萄 仲夏及初秋大量上市的水果,品种众多。含多种糖类,维生素等营养

发表于:2019-01-08 / 阅读(64) / 评论(0) 分类 英语口语

Saldado's hat trick gives Valencia 3-0 win at BATE MINSK, Oct. 23 (Xinhua) -- Roberto Soldado's hat trick led Valencia to a 3-0 win at BATE Borisov in a European Champions League group match on Tuesday night in Minsk. The victory kept alive the Spani

发表于:2019-01-11 / 阅读(66) / 评论(0) 分类 英语新闻

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(78) / 评论(0) 分类 VOA标准英语2014年(一月)

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(56) / 评论(0) 分类 白领英语晨读

DEVELOPMENT REPORT - Plumpy'nut Aids Fight Against Hunger By Jill Moss Broadcast: Monday, April 25, 2005 I'm Gwen Outen with the VOA Special English Development Report. Nutriset is a food company in F

发表于:2019-01-30 / 阅读(120) / 评论(0) 分类 农业与发展

MINSK, Nov. 1 (Xinhua) -- AC Milan were held to a 1-1 draw by a spirited BATE Borisov in Champions League Group H on Tuesday in Minsk. Milan's striker Zlatan Ibrahimovic put the visitors ahead in the 22nd minute. BATE was enjoying several promising c

发表于:2019-02-05 / 阅读(108) / 评论(0) 分类 英语新闻

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(80) / 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(89) / 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(86) / 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(112) / 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(102) / 评论(0) 分类 TED演讲教育篇

Lesson 7 Entertainment 第七课 娱乐 December 15 12月15日 Let's Go to a Christmas Show! 看圣诞秀! Read it! 读读看! Rob is talking to a ballet dancer. 罗柏正和一位芭蕾舞者说话, Her name is Tina Twirl. 她是缇娜.旋转小

发表于:2019-02-23 / 阅读(126) / 评论(0) 分类 大家说英语

Closing the door upon the landlady, I endeavored to prevail upon Queequeg to take a chair; but in vain. 老板娘走后,我关上了门,试图说服魁魁格坐到椅子上来;但是,白费。 There he sat; and all he could do-for all my polite arts

发表于:2019-02-25 / 阅读(79) / 评论(0) 分类 白鲸记

传统意义上的古曲是指中国古代流传下来的,有较高知名度的乐曲。这些古曲大多属于器乐曲,而且大都出于诗人之手创作而成。在中华5000多年的文化长河中,古曲(古诗词歌曲)是中华民族的

发表于:2019-02-26 / 阅读(112) / 评论(0) 分类 阅读空间
学英语单词
a wide range of
adamancies
affrighting
altricial
alveolar glnads
anomalous resonance
anti-semitism scale
autologous
bacteriopurpurin
banner head
be highly reputed
bethanize
blast roaster
Blds
body persecution
boynton
bysening
cleft lip
Cold Rolled Finish
cornsteep
cultured stones
cut capacity
dangerous sector
dense flint glass
differential declines
east short pine hills
efficiency apartments
eight days
entoria longiopercula
environmental limits
epigastric lymph gland
Fenit
formyl-methionyleucylphenylalanine
frequency-modulation broadcast band
full customed
genus Weigela
glasshardened
grayhen
Hambach
heater cathode
hydrazonoic
jugular tubercle
key drive
kienbaum
knockmealdown mts.
Kozhanka
L. & R.
mechanical grit arrester
multi-block slide
multiploid
mythopoem
napkin tissues
narcoculture
neonatal subdural hemorrhage
noncontrolled area
nonsalesmen
Normaoestren
nozzle friction
nuclear pressure retaining component
oleum cari
oncoclasine
one-man-bus
open one's mouth too wide
opsonic reaction
orogenic cycle
p27kip1
Para rhatany
Pentrol
phase-unstable
photo finishing
pilot night vision system (pnvs)
Potter-Bucky grid
predecessor function
preparation of grouped raw coal
PRIFLY
progress of audit
prompt
QppD
Rajmahal
recirculated air
revisit interval
rewrite operation
riveted and welded
rubus henryi var.bambusarum(focke)rehd.
SADL
Schizophragma integrifolium
seal groove
solar energy conversion
specialized processing
strongness
succino-canavanine
Texas leaguer
thoracoplasty
thyrle
us prose
Vincent I.
water mustard
water-violet
wave summit
weinek
West Banker
wussifies