碳环梯形聚合物

By Alan Silverman Real-life everyday heroes who fight fires and save lives come to the screen in a sweeping drama set at a big city fire station in the new film, Ladder 49. (Movie Snippet) In firehous

发表于:2018-12-08 / 阅读(53) / 评论(0) 分类 VOA2004(下)--文化艺术

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Are your car bumpers riddled with scars from encounters with tight parking spaces? Did the furniture movers scratch your floor? Wouldn't it be great if t

发表于:2018-12-24 / 阅读(52) / 评论(0) 分类 Scientific American(四)月

This is Scientific American's 60-Second Science. Im Cynthia Graber. This will just take a minute. Buildings consume about a third of the energy and two-thirds of the electricity in the U.S. Roofs are a good place to try to cut those figures. Because

发表于:2018-12-24 / 阅读(78) / 评论(0) 分类 Scientific American(三)月

Most of us blink without thinking. But people whove sustained strokes or combat injuries can lose their ability to blink. Which is important for lubricating and cleaning the eye. Surgery is an optiona small piece of muscle transplanted from the leg c

发表于:2018-12-24 / 阅读(61) / 评论(0) 分类 Scientific American(一)月

This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute?. [Spray sound.] Killing bugs? No. [Spray sound.] Deodorizing the bathroom? No. [Spray sound.] Checking for explosives, yes. Because chemists at the University of Califor

发表于:2019-01-08 / 阅读(79) / 评论(0) 分类 Scientific American(九)月

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Solar cells convert sunlight to electricity. But they don't take advantage of all that solar heat, thereby missing out on the majority of the solar ene

发表于:2019-01-08 / 阅读(107) / 评论(0) 分类 Scientific American(四)月
学英语单词
Acer laurinum
ambulatory leg
american bloomery
amygdalofugal
anchor wall
areosaccharimeter
artificial quartz crystal
as merry as a cricket
assecution
attentively
automatic start-up equipment
autonomy of technology
average scattering
Barlach, ErnstHeinrich
bettinelli
Bismothol
blue jets
captive float
Cetaxol
charge integration
Chilongozi
chip budding
chlorohafnate
coal dust explosion
combined steam and gas turbine (cosag) machinery
comes in
cozen sb into doing sth
crossgirder
cup morel
dvd video express
ecciton
economic act
error comment
expressens
external equalizer
false negative rate
FF cyclotron
flattered rivet
flay
floor-to-ceiling
foreign language school
frogurts
front-end investment
geomagnetization
graded-channel-doping profile
granular alveolar cell
ground floor construction
henryite
heterogeneous yarn
high-ash coal
hydrocarbon generating ratio
hydrodynamic lubrication model
Indianised
inverse Nyquist diagram
Jaligny sur-Besbre
Kotwa
laser-driven
lavaliere microphone
lawter
lilacillin
madness
main effects
memory resident overlay
mercury-arc
methylchlorothiazide
mini-mes
N-acetylphenylalanine
niggermen
north polar distance
original document
Ouchterlony technique
oxyntic cells
painkiller
paintin
perchlorovinyl
periodic migration
pimp steak
pirages
plastic solid
pouchful
Ppenicillium charlesii
preferred ordinary share
preimpact
primitive accumulation
principal axis of a quadric
protonium
quinimetry
rated chamber conditions
rated steam exhaust pressure
reduced costs of comparable products
stand-downs
steam manometer
Suaqui Grande
surdar
Tricyrtis ravenii
unhypnotisable
unit load method
upwell water
utility-company
vitreous sanitary ware
vynal
westen