甲基氨基嘌呤

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(66) / 评论(0) 分类 Scientific American(三)月

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. As Valentines day approaches, remember, its the thought that counts. Just ask a decorated cricket. Because according to a study published in the January

发表于:2018-12-24 / 阅读(59) / 评论(0) 分类 Scientific American(一)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
学英语单词
acceleration lane
accompliment
AirTunes
Angeja
antikinks
area of nozzle throat
artificial nutrition
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b-b
banach inverse mapping theorem
before one can say knife
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Blood and Sand
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estivate
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fateh
fertilizing material
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Flubendazolum
fluting board
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gemms
general crossed check
genus halicoeress
giulini
grata
gulatis
Hebraic alphabet
hypoconus
image data query language
isps
Lefaga Dist.
length between perpendiculars
lipomatous myxoma
loose bodies
macrosporium ricini (yoshii) hansford
make ... do
market-oriented journalism
Meglin
moon phase starwheel
multi-element control system
multioperator welding generator
multiple strand chain
otm
overcanopied
Oxytropis reniformis
panamensis Bentham Swertia
passing spring
patent foramen ovale
pay by T/T at time of shipment
polytropic gas sphere
Porphyrio porphyrio
prasine
proglottid
Protorosaurus
rainjoy
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Vobkent
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