[化] 5,5-苯基乙基乙内酰脲

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(129) / 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(117) / 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(88) / 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(94) / 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(59) / 评论(0) 分类 初学者听力文摘精选

its time again for the A Moment of Science mailbag. A listener writes: Dear A Moment of Science, Ive always been fascinated by volcanoes. So I was wondering: How well can scientists predict when and where a volcano will erupt? Intersting question. Th

发表于:2018-12-31 / 阅读(55) / 评论(0) 分类 英语听力文摘 English Digest

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(104) / 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(101) / 评论(0) 分类 Scientific American(十一)月

歌曲 : Keep On Moving 艺人 : Starstylers Ft.Michy 音乐星级 : ★★★★★ 所属专辑 : 未知 发行年代 : 2006 风格 : Dance 介绍: 关于Starstylers Ft. Michy在网络上很难找到他们的信息,只知道他们好像是一个DJ组合,组合形式跟舞动精灵差不多,Keep On Movi

发表于:2019-01-11 / 阅读(113) / 评论(0) 分类 舞曲狂欢

By Cathy Majtenyi Uganda 26 June 2007 The Ugandan government has taken a progressive approach to helping the disabled by passing legislation that recognizes the rights of the disabled, providing representation for them in Parliament and specifying me

发表于:2019-01-13 / 阅读(137) / 评论(0) 分类 2007年VOA标准英语(六月)

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(84) / 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(61) / 评论(0) 分类 白领英语晨读

今天Larry和李华在校园里闲逛,校园里到处都贴满了选举传单。今天李华会学到两个常用语:flip flop和wishy-washy. LL: Hey, Li Hua who do you support for class presiden

发表于:2019-02-03 / 阅读(145) / 评论(0) 分类 美国之音《流行美语》

BEIJING Jan. 10 (Xinhuanet) -- Keeping a healthy diet may help children with attention deficit hyperactivity disorder (ADHD) in their treatment, a new study revealed. The study was published Monday in the American medical journal Pediatrics. After an

发表于:2019-02-04 / 阅读(140) / 评论(0) 分类 英语新闻

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(217) / 评论(0) 分类 英语新闻

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发表于:2019-02-10 / 阅读(120) / 评论(0) 分类 加州英语分级G1

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(86) / 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(101) / 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(94) / 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(114) / 评论(0) 分类 TED演讲教育篇
学英语单词
a wad
American fried potatoes
anemia infantum pseudoleukemica
Antalya Körfezi
any less
autofade
bain(s)-marie
basic recorder of objects in c
bat detector
Beas
blind as a mole
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calcium nitrite
capsicum spices
car-dumper
carbon-beam concrete
card backup
cascade connetion
chicken-and-egg
compensation to living labor
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couta
damage function method
dehydratase
diagenetic fracture
Dichrocephala integrifolia
dodecastyles
drag at
electric motive force
ENCA
endometriosis of vulva
eriocaulon aquaticums
evaporative surface (evaporation surface)
exceptation
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fcps
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Ficus wightiana
fire button
gabbiadini
Gallocol
genus ankylosauruss
God Rest You Merry Gentlemen
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halting problem of flowchart schema
Higgins larva
immersible motor
in shop
ion-acoustic velocity
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Kommunizm
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kz
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lepisorus morrisonensis
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the finishing touches
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Ubenazomozi
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variable micrologic
waded in
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xylocopa ruficeps
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