N-乙基乙醯胺, N-乙基乙醯胺;乙醯乙胺

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(131) / 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(89) / 评论(0) 分类 VOA双语新闻 2014年1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(62) / 评论(0) 分类 白领英语晨读

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(90) / 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(103) / 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(96) / 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(116) / 评论(0) 分类 TED演讲教育篇
学英语单词
accommodative asthenopia
all weather (aw)
ampliator winding
an eye for an eye
aneugamy
attribute description
auditory osseous
birefringent compensator
blackwaters
British Motor Trade Association
budino
charismaless
climatotherapist
coast fortress
cogwheel respiration
collagenzation
credit for dividend
Cynanchum wallichii
Câmpulung
data sampling unit
deer fly fevers
deoxyguanosine triphosphate
dihydroxytheelin
directorates
discrete system channel
double-bottom trailer combination
drazoxolon
employers
enfermedades
facetted boulder
factualness
fanboy
far left
FH-M
fine melt resin
flag over bound
food-processors
four-row tapered roller bearing
frahm frequency meter
gastrointestinal
glabranin
goings
grooved
grounded cable bond
hash up
high-frequency symmetrical cable
hyaloallophane
IHCC
impact penetration test
incidental musics
indirect labor costs
kerfed
kurgan
lime soil
lose you
magnesium flat cell
Malysheva
Matundulu
mercaptopropionic acid
metallic-ionic mixed bonding
methyl atropine
mini-season
minimum visual angle
modified inverted T blade root
multi-frequency code system
Nep.
net buy
Ocwen
peat plant
persure
photo site
plenicorn
populous
print report
R-C integrating network
record operation
ressam
rke
salmans
scaffoldize
semiproduction
sestrons
sialoncus
spatted
sports medicines
star-turn
Stealth Tank
steering knuckle king pin
Stokenham
supergroovy
swung at
systematic residuals
telegraphic order
turpentining
unhypothesized
up town
veal sausage
vibrocompaction
walgrave
went with the flow
write direct
Yeltsin, Boris Nikolayevich