音标:[,tetrә'meθili:n] ;
n. [化]四亚甲基
n. A hypothetical hydrocarbon, C4H8, analogous to
trimethylene, and regarded as the base of well-known series or
derivatives.
n. Sometimes, an isomeric radical used to designate
certain compounds which are really related to butylene.

This is Scientific American Sixty Seconds Science, I'm Sophie Bushwick, got a minute? When Mexican tetra fish moved into darker caves long ago, they evolved to deal with the dark by becoming albino and going blind. A new research shows that the chang

发表于:2018-12-24 / 阅读(214) / 评论(0) 分类 Scientific American(一)月

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DAVID GREENE, HOST: Families across the United States are fighting with the federal government over a deadly chemical. Dozens of people have died from inhaling methylene chloride. This is an ingredient in common paint removers. NPR's Rebecca Hersher

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10 Getting The Lead Out 第十章 把铅撵出去 In the late 1940s, a graduate student at the University of Chicago named Clair Patterson (who was, first name notwithstanding, an Iowa farm boy by origin) was using a new method of lead isotope measur

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学英语单词
- morphous
act of notary public
adjustable sieve
al firdan
alkannet
Amharics
anterior centrosome
Autotrading
Barrow Str.
bathmotropism
beat cycle
Behave yourself!
best-liked
boat your oars!
bookcrossing
brunevals
building and loan association
building block principle
calcite saturation level
carisbamate
CDAI
chamber lamp
chlamys quadrilirata
complex datahandling center
countertop water purifier
cph
cyclovoltammetry
desulphurization(-sation)
develop distortedly
dicky birds
Echtrotsalz
educational base
elham
endurance athletes
eruditenesses
essential constant
faraday pendulum
fictionise
filling gauge
Flounderkin
fule
gas-insulated metal-enclosed switchgear
Giam
glisk
gloose
high temperature thermo-setting
hologrammed
hypertrophic cheilitis
involucellum
istel
large scale hybrid microprocessor
lehel
live camera
martail
micro flame photometry
milliamine b
Moro G.
mortgage registry tax
n-base binary logic
negative current
night blindness
noise constant
non-co-operations
okatie
ondra
palaeobiodiversity
paracmastic
pass sheet
philip michael ondaatjes
pink cornworms
pregnancy symptom
protonemata
puriri
real time analog digital computation
Robicap
Rythmonorm
sleepiness
space motion sickness
spasmodist
speciesspecific
spherical indicatrix
sprightless
stand on
starred polygon
stylistical
surface current density
system/360
talmy
tear-drop pattern
the golden section
three-ball match
track distance
trancey
trough core
Trust Law
Tyne River
warlike operation
west africas
who-are-you
yaksen
Yuta
Z cam