四乙基铅

151 There is a kite in the sky. 152 It's like a bird. 153 It's very high. 154 Is there a football under the chair? 155 Yes there is. 156 There are some footballs under David's chair. 157 There is a piece of bread. 158 There is some water. 159 Are the

发表于:2018-11-30 / 阅读(294) / 评论(0) 分类 小学英语300句

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(224) / 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(185) / 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(212) / 评论(0) 分类 Scientific American(一)月

释义: get mad (angry,upset) 生气 这是 get 用作 become 的情况。get 后面会接形容词,表示变成样,也可以用 be 代替 get。 例句: Don't worry; I'm not going to get mad. 不要担心,我不会生气的。 I promise

发表于:2018-12-27 / 阅读(153) / 评论(0) 分类 外国人日常短语

bane, [bein] n 祸根(死亡或毁灭的根源);致命伤 【例】the bane of one's existence 克星 【记】1)ban挡住-挡住运气-祸根 2)读:背。点儿背-祸根 【反】blessing(n 祝福);benefit(n 利益好处)

发表于:2018-12-30 / 阅读(135) / 评论(0) 分类 不择手段背单词

avarice n 贪财=cupidity=rapacity 【根】avar渴求。avid(adj 渴望的) 【记】ava读:爱挖,rice大米。爱挖大米。这种人是不是有周八皮的风范!连大米都不放过,太贪财了! 【类】avarice:money=glu

发表于:2018-12-30 / 阅读(210) / 评论(0) 分类 不择手段背单词

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(201) / 评论(0) 分类 医务英语

By Noel King Kigali 08 September 2007 Humanitarian aid groups are sounding the alarm as fighting in the eastern Democratic Republic of Congo forces tens of thousands of civilians from their homes in North Kivu Province. Noel King has more in this rep

发表于:2019-01-09 / 阅读(348) / 评论(0) 分类 2007年VOA标准英语(九月)

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(189) / 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(162) / 评论(0) 分类 白领英语晨读

BEIJING, Nov. 21 (Xinhuanet) -- Oscar winners Tim Robbins and Adrien Brody will join the cast of Chinese director Feng Xiaogang's famine-themed epic film 1942, according to Variety.com. The production company responsible for the project, Huayi Brothe

发表于:2019-01-20 / 阅读(160) / 评论(0) 分类 英语新闻

By Lisa Schlein Geneva 06 August 2007 The World Health Organization says all countries, with the exception of Indonesia, are sharing their avian influenza viruses. WHO says the failure to share virus samples could retard the development of an effecti

发表于:2019-02-05 / 阅读(272) / 评论(0) 分类 2007年VOA标准英语(八月)

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(180) / 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(197) / 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(206) / 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(222) / 评论(0) 分类 万物简史

南非政府正在紧锣密鼓的准备曼德拉的葬礼 JOHANNESBURG, Dec. 7 (Xinhua) -- The South African government announced on Saturday that preparations are in full swing for the funeral of former president Nelson Mandela. Among the arrangemen

发表于:2019-02-17 / 阅读(192) / 评论(0) 分类 英语新闻

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(217) / 评论(0) 分类 TED演讲教育篇

1.Yes. 好的。 2.Id rather be with you 我更愿意跟你待在一起 3.Are you free Saturday night? 周六晚上有空吗? 4.Theres something you do that I find adorable. 我发现有时你很可爱。 5.That looks good on you. 你看上去帅呆了

发表于:2019-02-26 / 阅读(181) / 评论(0) 分类 英语口语
学英语单词
aerts
ago-was
Ahunvar
alive and kicking
approved bond
arbitrages
at one whack
audio communication line
Bilings
blasting off
blattnerphone
bright white
cespitosa
childre
ciliopagurus strigatus
cluster random sampling
commercial sintered bronze product
convulsion center
Conyza
decussatio lemniscorum medialium
Diana Reef
Do try more.
earth-mercury trajectory
energy saving investment
enerobiasis
enzootic ovine abortion
equilibrium beach profile
ex-gratia payment
extinction time
family branding
fictitious sale
flexure crystal
fluorescent penetrate inspection
fried oysters
front end cover
henwoodite
hollow billet
homotopy chain
IIL slice
implicit policy
importancy
in-core flange seal test plug
inseads
isg
jimin
jockey stain
Kolari
layer series of development
leave sb. on the mat
light-catalysed
magnetic biashing
martir
mazzariello
medullary fasciculus
micro electromechanical systems
micro USB
micro-densitometer
mismanagement
Mohs, Friedrich
monoecious plant
multidirector
navigation condition
non-freezing lubricating oil
non-socialists
number of revolutions to speed
nutrient cycle
open-hole completion
operational instruction
phosphorhidrosis
Polo cloth
polytrichid
pre impregnated material
prefinished
process of
progression plastic yield
projectionists
prototype pattern
radial paralysis
radioteletype writer
s/370 channel address
sale of finished goods
savourest
secondary sclerenchyma
short salvo
single lip wiper
small changes
snobisme
solid-state drive
spurious resolution
state supreme courts
strombolian type
subdiaphragmatic free air
sunray pleats
sweating soldering
tbsps
thermomagnetic coversion
trawls
tunnel floor heave
universal fuel tank kit
Victoria Land
weathered feldspar
wound tumor virus