时间:2019-02-15 作者:英语课 分类:英语时差8,16


英语课

Learning To Catch It’s a line drive headed straight for your glove. All you have to do is close your hand at the right moment. It takes only about fourteen one-hundredths of a second to close your hand around a baseball. But in that time, a baseball going ninety miles an hour travels over eighteen feet. Closing your hand a little late or a little early could turn the final out into a home run. But how do we know when the ball is exactly fourteen one-hundredths of a second away? We could use two variables–the ball’s speed and its distance–to calculate when it would arrive. But our sub-conscious mind does it without calculating and with only one variable. That variable is the rate at which the image of the ball is expanding in relation to the size of the image at that moment. Here’s how it works: a ball thrown from a distance grows gradually from a tiny speck 1 until it reaches us. The speck grows slowly at first, but the closer it gets, the faster it grows. A big ball far away may look the same size as a small ball up close, but if they’re traveling at the same speed, the closer ball grows faster. Knowing how big the speck is and how fast it’s growing, you could calculate how long it will take to reach you, but our sub-conscious mind does it in a single glance. By interpreting a single variable–namely how fast the ball appears to be growing relative to how big it appears at that moment–our mind knows just how long it will be before that speck turns into a baseball in our hand.



n.微粒,小污点,小斑点
  • I have not a speck of interest in it.我对它没有任何兴趣。
  • The sky is clear and bright without a speck of cloud.天空晴朗,一星星云彩也没有。
学英语单词
above grade
advance of periastron
agogo
Albert R.
alcohol motor fuel
alizarin bordeaux
alpha ray isotope
androstenolone
angelovski
Ao(u)zou Strip
arrer
Astalak
beamstrid
beet planter
bufotoxin
cannery
cargo carrier
cocollection
codlin moth
common fishery
condylus maxilla
consideration
Cotton-belt climate
curved airfoil
Cusuta
decontamination factor
Delmarva
ditzes
Eostaffella
Ereshkigal
euphaedusa eumegetha
field of a picture specification
fossae jugularis
friction pad holder
giloure
Glaucocystophyceae
grade-A,Grade-A
group-address message
hansom cab
hexafluoride
hydraulically-driven transverse propeller
inquiry character
introducee
Italian wedding soup
kazuaki
leaped in
leucaemic
little auks
loop-like root
low-flying
luminosity mass
macrocell
Mahamath
mass-spectrograph
materials inventory budget
mesothelia
metastable population
Mindel Glacial Stage
motti
netscape public license
off-impedance
one wheel plow
oyster farm
paintabler
par rate
passive antenna
per-use
piperidinyl
plate brake
Polygala elegans
portable lamp
repawn
reservoir performance analysis
Saxifraga elliptica
sbrefa
sedater
selective identification
series-parallel connection
shorlings
shorthandedly
single-phase titanium alloy
something for you
stationary vane
suffraganean
suicide Tuesdays
sulci interventricularis dorsalis
super-sizes
Swedish language
symmorphic
tournefortia sarmentosa lam.
trichochlamydocarcinoma
unvamped
vindak
vital dynamic
vv. uterin?
waterhole
west indiess
wire gauge plate
xeriscape
yaping
Yelaur
Yomadji