2-氨基-4-甲基吡啶

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

Egyptian archaeologists have discovered the bottom part of an unknown pyramid in the Sakkara area about 18 miles south of Cairo. NationalGeographic explorer-in-residence Dr. Zahi Hawass, the Secretary General of the Egyptian Supreme Council for Anti

发表于:2018-12-30 / 阅读(63) / 评论(0) 分类 国家地理2008年

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

Egyptian archaeologists have discovered the bottom part of an unknown pyramid in the Sakkara area about 18 miles south of Cairo. National Geographic explorer-in-residence Dr. Zahi Hawass, the Secretary General of the Egyptian Supreme Council for Anti

发表于:2019-01-22 / 阅读(68) / 评论(0) 分类 自然百科2008年

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 Brian Padden Irbil, Iraq 17 August 2007 The death toll from a series of suicide attacks on Iraq's Yazidi sect on Tuesday continues to rise. Officials now estimate at least 400 people were killed and hundreds more wounded when four truck bombs expl

发表于:2019-02-03 / 阅读(102) / 评论(0) 分类 2007年VOA标准英语(八月)
学英语单词
adanon
adrenergic agonist eyedrop
amnionic rupture
anastomosis of recurrent nerve
arsepidine
associated pair
Atomic Energy Research Establishment
Aussillon
beauty dish
belge
betacell
bulbitis
cartmell
chercher
chestnut for culinary use
clogs up
collander
contact encoder
core disassembly
destroyed
different electrode
dominant negative mutation
dumping bolt
East Porcupine R.
eclampsia antepartum
edgeless
egg nog
enfreedom
enviroscopes
Etak Navigator
fapworthy
fermentative microbiology
fore-and-aft rigged
frontenac
function isomerism
gelatin paper
genus Trogium
geocontainers
gravitation constant
ground shift
Hukarere
i-fered
immer
incidental felling
independent production house
indo-malayan fauna
industrial market research
internal disorder
Judge Advocate-General's Department
lanthanum hydroxide
layer vessel
lead someone astray
loosely bound
ludology
magdalenka
magnetic information material
Massa Lombarda
matricizing
microdrill
misaunter
momtrepreneur
mora diamond
multiconnection
neutralization station
nifluridide
one-side z transformation
oromaxillary fistula
other semiconductor lasers
otometry
palatine sinus
pass off as for
plaster of cantharidin
put something out of sight
radioactive decay scheme
received page counter
right angles
Rossburg
S phase
salsabils
selection sequential access
semiopened
seroconverted
sigmoid progradational
smokebox door hinge
stable matrix
stationary wave theory of tide
sternorhabdite
stratum mucosum
strongarm
system master tapes
Tannakian
that is not the question
transverse drain ditch
trumpet flower
unpaternally
Urowa
vacuum ingot melting
Vas lymphaticum
volumetric heat exchanger
voude
wallpaperlike