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。
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air-mass analysis
audio-switch
bounce to
chapman-jouguet point
civil aeronautics
codirectional timing
collective motion
comprehensive description
computer dependent language
cultice
d-to-a
deceptive mark
dolich-, dolicho-
edge breaking
elastic constants
elastic limit in bending
emerge out of
equilibratory organs
Eucalyptus camphora
Eucinostomus
evaluation of project
exposed aggregate finish
fatigue loss
foot squared
furyloxyfen
glyceridase
got across
grinding material
gruagach
hold ... dear
hottest-selling
industrial management program
kalley
kauanui
kendo
kitchen help
Knipovich Ridge
landries
li pi
light germinater
linguas
long-flame coal
magazine loader
magnesite refractory
melodramatizes
metatarsophalangeal joints
morraine
multirope skid gear
n. p.
no thoroughfare !
nominal insulation voltage
nonanalyticity
nonwedding
notist
NVLD
Old High German
open-bite malocclusion
ophioripa
orientation of surveying instrument
overlair
phloem treatment
photo magnetoelectric effect
pipe header
planithorax
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positive lag
power saws
productive technology management
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quail hawk
radioactive half-life
ray tracing formulas
raytraced renderer
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sorting by merging
special room
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stonehorse
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suggestion letter
Tereshkova, Valentina Vladimirovna
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transglutition
unequal weighting
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unnotice
velocity gradient tensor
X-wing crotor
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yukichi