时间:2018-12-31 作者:英语课 分类:英语听力文摘 English Digest


英语课

   Sleeping With One Eye Open


 
  There’s an old saying that if you think you’re in danger, you might ought to sleep with one eye open.
 
  Well it turns out that many kinds of birds do just that.
 
  A group of scientists at Indiana State University studied mallard ducks to learn more about this trait 1. They filmed a row of ducks while they were sleeping. Sure enough they found that a good part of the time the ducks at the ends of the row kept the eye facing away from the group open, while the eye toward 2 the other ducks closed in sleep. The ducks within the row were more likely to close both of their eyes to sleep.
 
  The ducks at the ends of the line were actually controlling which side of the brain stayed awake, and which dozed 3. They were engaging in what scientists call single-hemisphere sleep. The eye controlled by the sleeping side of the brain closed, while the active side kept its eye open and on the lookout 4.
 
  You can see how this is good for the group and for the lookout duck as well. The group gets the protection from having someone pulling guard duty, while the guard duck is at least able to get some rest.
 
 
  睁一只眼睡觉
 
  有个很老的说法,如果你觉得自己处于危险之中,你会睁着一只眼睡觉。
 
  事实证明许多鸟类确实如此。
 
  印第安纳州立大学的一群科学家通过研究野鸭,对它们这个习性有了更多的了解。科学家们在鸭子们睡觉时进行拍摄。果然,他们发现队伍两端的鸭子朝外的那只眼睛长时间睁着,而朝向其它鸭子的那只眼睛闭着睡觉。在队列中间的鸭子们则双眼紧闭睡觉。
 
  队列两端的鸭子实际上在控制哪边的大脑保持清醒与休息。它们处于科学家们所称的单边睡眠的状态。被睡眠状态大脑控制的眼睛闭上,而被运转状态大脑控制的眼睛睁开放哨。
 
  这种习性对整个群体及放哨鸭子非常有益。鸭群通过一些鸭子放哨获得保护,而同时放哨鸭子至少能得到一些休息。

n.显著特点,特性
  • Creativity is a human trait.创造力是人类的一种特性。
  • Repose of manner is an estimable trait in a horse.神情镇定是一匹马可贵的特质。
prep.对于,关于,接近,将近,向,朝
  • Suddenly I saw a tall figure approaching toward the policeman.突然间我看到一个高大的身影朝警察靠近。
  • Upon seeing her,I smiled and ran toward her. 看到她我笑了,并跑了过去。
v.打盹儿,打瞌睡( doze的过去式和过去分词 )
  • He boozed till daylight and dozed into the afternoon. 他喝了个通霄,昏沉沉地一直睡到下午。 来自《现代英汉综合大词典》
  • I dozed off during the soporific music. 我听到这催人入睡的音乐,便不知不觉打起盹儿来了。 来自《简明英汉词典》
n.注意,前途,瞭望台
  • You can see everything around from the lookout.从了望台上你可以看清周围的一切。
  • It's a bad lookout for the company if interest rates don't come down.如果利率降不下来,公司的前景可就不妙了。
学英语单词
AAGUS
advauncing
agenthood
antitraditionalism
apomixes
bartang r.
Beijing Geodetic Coordinate System 1954
biologic energy
blocked operation
BOL (beginning of life)
broadcast home
bunk covers
cesar chavezs
chronotron
Coast is clear
coilingly
crankum
CRW
cut-off valve
defence spending
detective time constant
dilacerating
dragon piece
Dueodde
ECLA
electriclpower station
elstein
equulites absconditus
etherising
Eurosam
external hemorrhoid
ferte
fish strainer
fishing bank
fore line
forward lead of the brushes
funds for fisheries
Greenwich mean noon
helping-hand phenomenon
Holtwood
homotaxia
hot and hot
how are you fixed for sth?
ingan
initial orders
integrated camera
interior escape stair
isolated phase bus bar
isolated sign
Jovian magnetopause
klammers
La Gloria
Latimeridae
leprosied
leukorrheal diseases
liriodendra
Lithcarb atmosphere
logging depot
love-egg
mariner project
Minalpha
mother wart
Mountain Lakes
NOC (network operation center)
nondimensional
number of magnetic flux inter linkage
oilnut
optical shutter
papaveraceous
Payong, Bukit
photoelectrical refrigeration
polyformate
prescribed value
pressure-main
printed substrate
psychiatric drugs
radioiodinated steroid
random schedule
red-lead putty
ridged beach plain
Rose-cold
semidarkened
silktails
single-particles
sound post
strobe memory
study-time
swastikas
tallow-tree
tallowing
the-writings
Tongoy
trans-regulator
trolley-jib tower crane
unmediatized
vitellogenins
water tight sluice door
welfare building
wet calender stack
window film
wine-based
working principle diagram