庚酸甲酯

This is Scientific Americans 60-Second Science. Im Cynthia Graber. This will just take a minute. Saliva contains many useful components: lubricants, enzymes for breaking down food and now compounds that can reveal a persons age. Thats according to a

发表于:2018-12-24 / 阅读(59) / 评论(0) 分类 Scientific American(六)月

Ever get a sour stomach after your morning coffee? Well, you might end up switching to a dark roastbecause that coffee concoction may leave you with a happier tummy. That's according to the research presented at the American Chemical Society meeting

发表于:2018-12-24 / 阅读(65) / 评论(0) 分类 Scientific American(三)月

AGRICULTURE REPORT - Restrictions on Methyl Bromide By Mario Ritter Broadcast: Tuesday, March 16, 2004 This is Steve Ember with the VOA Special English Agriculture Report. Graphic Image Some chemicals

发表于:2019-01-06 / 阅读(83) / 评论(0) 分类 农业与发展

By Caty Weaver Broadcast: September 12, 2003 This is Bob Doughty with the VOA Special English Environment Report. Scientists in the United States have reported some good news about the 1)ozone in the

发表于:2019-01-11 / 阅读(66) / 评论(0) 分类 VOA2003(下)-环境与健康

Science and Technology Epigenetics and stress Baby blues 科技 外因遗传与压力 新生儿蓝调曲 A mother's stress while she is pregnant can have a long-lasting effect on her children's genes 母亲孕期压力过大会对孩子的基因造成长

发表于:2019-01-26 / 阅读(57) / 评论(0) 分类 经济学人科技系列

与数字有关的英语词根总结 milli-【千分之一】例:milliampere(毫安)=milli(千)+ampere(安培) centi【百分之一】例:centimeter(厘米)=centi(百分之一)+meter(米) deci【十分之一】例:decibe

发表于:2019-02-06 / 阅读(109) / 评论(0) 分类 英语学习方法
学英语单词
acidoproteolyte
alkali-resisting
alternaria oryzae hara
applicators
approach-avoidance
assembly statement coding
azonine
bandolino
barbed tributary
board or asbestos cement
bobby calf
bomb handling vehicle
bunch knot
catenary curve
chemical spread function
Chernogolova
cholangiocellular carcinoma
coarctate larva
coarse-grained soil fill
coenocorrelation
cold stop
Convolvulus altheoides
crude extract
deka-cycles
deltavirus hepatitis delta virus
display brightness
Encyrtidae
entertain against
eristalinus laetus
extended piston rod
extrusion direct
family dasyurinaes
field-effect transistor multiplier
frictional factor
fuzzy differential calculus
glandage
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gordonville
graphite steel
gray softe
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informa
inorganic macromolecule
international effort
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ioderma
item response theory
jean arps
jockeying
koaxin
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Milton Friedman
movement weight mass
myodynias
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ninigis
oka
openup
pallet arbor
parallel ring accumulator
Pedicularis robusta
petty disbursement
phones
Pigment Permanent Red F4R
preferendum
priority control
probit method
protected deck
ravener
reprintings
Romango
semi monocoque
servo output signal
single sideband reduced carrier
slack tides
sold on order
special routine
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subsidiary beam
syllable chart
throttling range adjustment
tie in arrangement
tillability
to align A with B
toxogoninum
truncatum
Tulipa dasystemon
ultra-filtration
variegatas
vee notched specimen
Walpia
warwalking
whitesboro
yield a point
zero-gross gradient