时间:2019-02-15 作者:英语课 分类:英语时差8,16


英语课

During the fraction of a second that a saccade takes, images sweep over our retinas at high speed. Yet we don’t get a feeling of motion, because our brain suppresses visual perception during saccades. Otherwise, the world might look to us like a bad home video where the photographer held the “record” button down while swinging the camera around the room. An odd thing about this suppression is that it’s not complete. Get in the car and have someone drive you past a roadside fence. Without moving your head, glance quickly from front to back; you can make the fenceposts seem to freeze for an instant. Why, in this case, is vision not suppressed? A team of visual scientists published a study of this question in the journal Nature. They found that what gets suppressed during a saccade are large areas of light and dark. Those are the perceptions that seem to contribute the most to a sense of motion. Finer details, like fenceposts, are not suppressed, maybe because there’s no need to suppress them. Rapid eye motions usually turn them into a blur 1 anyway.


 

n.模糊不清的事物;vt.使模糊,使看不清楚
  • The houses appeared as a blur in the mist.房子在薄雾中隐隐约约看不清。
  • If you move your eyes and your head,the picture will blur.如果你的眼睛或头动了,图像就会变得模糊不清。
学英语单词
aerodynamics laboratory
aftb
ahbs
anchory
antennal gland
archduke ferdinand
bar silver
barnstars
Bergson, Henri
bib
binary decade counter
bombmaker
bubbe
busseys
button one's lip
cair
Carache, I.de
chewing-gums
chronic lymphangiitis
coaptatin
comminutio
continuous acid-washing
continuous clarifier
creepie
crepe lisse
damn with faint praise
deflowerers
deprivers
economic world
effective firing time
electric spark sintering
enstuff
exomixis
exposed resist
extra ply
eye infections
F pilus
fante
filter pipet
fine zero adjustment
five-digit numbering
flat monofilament
foreorder
FOTMs
four-momenta
gastroelectromyogram
genus malvas
genus Salvelinus
ground floor
hendecene diacid
homeward journey
horizontal curve
indifferent cells
industrial circles
instabulation
interface node
interform reliability coefficient
interpeptide
ion selective electrode method
isotacho-electrophoresis apparatus
linght finishing
location of branch
monopleurid
Motion For Directed Verdict
neothrinax flavipes
non-perishable material
Notification for Quarantine Clearance
one-way strip chromatogram
os pardi
osteocystoma
overactive odontogenesis
parametrial
passive arbitrage
peder
peru-bolivia volcanic zone
pilulifer
polymer waterproof materials
pressure-type evaporative cooling
pristomerus scutellaris
quise
Ranunculus reptans
reset coil
revare
review of financial statements
rivinus
safety stand
scotch system
Seattle Slew
shapedness
solution gas drive
SSIT
surgical spoon
take one's revenge
the high jump
trade mark registration fee
transco
translational axis
transparent data add facility
tricoid
tympanotemporal
walpole i.