时间:2019-01-02 作者:英语课 分类:60秒科学


英语课

Counterfeiters and money minters constantly try to outsmart each other. But money could become much harder to forge—thanks to butterfly wings.


Butterflies that flit through tropical forests often have brightly colored wings that irridesce in the sun. But it’s not pigments 1 that create those eye-catching shades. It’s microscopic 2 structures on the insects’ wings that reflect the light.


Researchers at the University of Cambridge studied an Indonesian butterfly known as the peacock or swallowtail. Scales on the wings are made up of tiny structures that researchers say resemble the inside of an egg carton, with alternating layers of cuticle 3 and air. The light bounces off the structures so that the scales appear to us as a shimmering 4 green. But using optical equipment that can polarize light, those scales appear bright blue.


Researchers used nanofabrication techniques to create scales structurally 5 identical to the butterflies’, and the structures presented the same gorgeous color. The research appeared in the journal Nature Nanotechnology.


Using the ‘now it’s green, now it’s blue’ technique that the butterflies have evolved, the scientists say we might be able to design money or credit cards that are much harder to copy. And perhaps add a little colorful flair in the process

 



n.(粉状)颜料( pigment的名词复数 );天然色素
  • The Romans used natural pigments on their fabrics and walls. 古罗马人在织物和墙壁上使用天然颜料。 来自辞典例句
  • The original white lead pigments have oxidized and turned black. 最初的白色铅质颜料氧化后变成了黑色。 来自辞典例句
adj.微小的,细微的,极小的,显微的
  • It's impossible to read his microscopic handwriting.不可能看清他那极小的书写字迹。
  • A plant's lungs are the microscopic pores in its leaves.植物的肺就是其叶片上微细的气孔。
n.表皮
  • You'd never puncture the cuticle.你无法刺穿表皮。
  • The reform has hardly made a scratch upon the cuticle of affairs.改革几乎还没有触到事物的表皮。
v.闪闪发光,发微光( shimmer的现在分词 )
  • The sea was shimmering in the sunlight. 阳光下海水波光闪烁。
  • The colours are delicate and shimmering. 这些颜色柔和且闪烁微光。 来自辞典例句
在结构上
  • The house roof was (structurally) unsound. 这屋顶(结构)不牢固。
  • Pinhole on shot-hole damage is never structurally significant. 针孔和蛀洞所造成的危害对结构的影响不大。
学英语单词
-phasia
advanced rural transportation system
ancillary resources
andrologia
arcus frontalis
bacteriomes
battlestars
betula populifolias
Big, large,
Castiglioncello
CC (channel controller)
chinne
Chlormuron-ethyl
chromospheric bubble
close in for the kill
colloidal graphite for fibre glass
conjunctive proposition
Cruikshank
delete capability
disassure
double heterojunction diode
electronic ceramic device
fat vacuole
follicular hydrops
footpad
formals
fourvey
fruitbat
Fua'amotu
geochemical dispersion
glaucarubin
green water deck wetness
grid plate characteristics
inch-meal
inference procedure
intermediate frequency signal
irregular nature of traffic
jumptv
La Virgen, Cerro
Lagarosolen hispidus
landside slope
lead compensation
lignaloe oil
logic control
logrolling legislation
maunching
mearstone
mincing knife
Mitteleschenbach
mole blade
myrons
narrow-leaved white-topped aster
natural theology
Neonalium
neuroautoimmune
new-land
niche differentiation
No power
occupation forces
octothorpe
out of collar
parthenocarpous fruit
Pedicularis pseudocephalantha
pension program
photoepinasty
polar distribution
Portballintrae
property insured
quasi peak
radiation analyzer
reverse conducting thyristor
Rhogogaster dryas
rubidium indium alum
saouma
Saxifraga aristulata
Simchat Torah
simulation centre
sinusoidal trace
skirt
soil erodibility
sour mushroom
stochastic perturbation
submerged coastal plain
taxed product
telectorate
tephrosia
through phrase
thudding
top-hinged swinging door
truth table reducibility
understudies
UnitName
virtual core
virusin
wavelength plate
wild apples
WILKIE
windowless presenter
withdraw an action
workers' management
working dogs
worth his salt