氯化甲硫基乙烷

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(64) / 评论(0) 分类 Scientific American(六)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(88) / 评论(0) 分类 农业与发展

Every winter some twenty million tons of salt are dumped on America's road.That sodium chloride melts the ice, so it prevents its formatin, helping to prevent accidents. But road salt has its downside. This is not very economical because salt is main

发表于:2019-01-20 / 阅读(107) / 评论(0) 分类 2016年Scientific American(一)月

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(58) / 评论(0) 分类 经济学人科技系列

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(59) / 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(68) / 评论(0) 分类 TED演讲教育篇
学英语单词
al mismiyah
alipinone-3-acetate
alkalophilic
ammonium cerium(iv) nitrate
Amniota
anaesthetically
architecture of plant
baby minder
barenaked
bariolage
be thrown out of one's stride
begrimly
Brignais
bronzino
chain carrier
coefficient of facewidth
continuous model
continuous telemetry parameter
core grinder
crown class
D-chalcose
decompressings
delayed gelling process
design algorithm
diffuse lymphoid tissue
disposal of goods at reduced prices
Dividend Frequency
edge jitter
elastic characteristic
feel-goodery
filariasis perstans
flicky
floating set
foot rot of rice
gas-filled type explosionproof machine
geohydrologic unit
geometric restitution
graphite septum
gripsack general agent
harringtons
havells
honorary treasurer
Howard Hanson Res.
hybridized combination
hydraulic power line
hynobius glacialis
Hypopterygium
hysterosomal shield
IFCA
inititating function
inyoite
jarretts
key value pair
kroes
late dough
law of conservation of mass and energy
linear comparator
logical identifier
logsdon
Lomapect
loss money
macromomycin
madamish
manyyears
marchionne
maulerss
microwave semiconductor diode
milk brother
Nifenazone-Isopropylantipyrine
nonrelativistic quantum mechanics
NSC-39084
of valuation
operation scheduling
Orthodon
Ouesso
pinballers
playsomely
poromyids
prefusion
question vector
RDGE
really good
record medium
redox electrode
road-hoggish
rock loader
self-adjusting pipette
sharpling
sheep-dips
slip out of something
snortled
songbeisine
standing armies
superzonal
task set
to scrub
tuberculous bronchiectasis
uranical
welding iron
well-shading
wintringham
yellow cartilage