时间:2019-01-07 作者:英语课 分类:2006年VOA标准英语(七月)


英语课

By Melinda Smith
Washington, DC
12 July 2006
 
watch Sleep and Memory report
 
  
  
How many hours of sleep do you get every night?  If you're like most of us, the answer is not enough.  Scientists have found that getting enough rest will help you remember more than just where you last put your car keys.


-------------


The study of 60 healthy young adults found that lack of sleep had a negative effect on the brain's ability to sort through and retain recent memory.


 
Dr. Jeffrey Ellenbogen
  
Dr. Jeffrey Ellenbogen helped conduct the study and says there is a correlation 1 between sleep and memory. "Sleep is actually actively 2 engaging the memory and making it stronger."


Medical researchers at Harvard University and the University of Pennsylvania told some students to sleep before they were tested on what they had just learned.  Other students did not sleep.  Those who slept had sharper memories than those who stayed awake. 


"Getting a good night's sleep strengthened and stabilized 3 the memory."


The link between sleep and memory was first established decades ago.  But the theory has remained controversial because researchers are still not sure how the brain retains memory.  Without that evidence, many scientists say they don't know conclusively 4 how sleep affects the process. This new study of 'declarative memory,' which is the ability to recall facts and events, does show marked improvement after sleep.


A survey by the National Sleep Foundation in the United States found that teenagers are among the most sleep deprived ... and most Americans between the ages of 18 and 54 sleep an average of six hours a night.  Health experts say seven to eight hours of rest is what most of us need to face the next day.



n.相互关系,相关,关连
  • The second group of measurements had a high correlation with the first.第二组测量数据与第一组高度相关。
  • A high correlation exists in America between education and economic position.教育和经济地位在美国有极密切的关系。
adv.积极地,勤奋地
  • During this period all the students were actively participating.在这节课中所有的学生都积极参加。
  • We are actively intervening to settle a quarrel.我们正在积极调解争执。
v.(使)稳定, (使)稳固( stabilize的过去式和过去分词 )
  • The patient's condition stabilized. 患者的病情稳定下来。
  • His blood pressure has stabilized. 他的血压已经稳定下来了。 来自《现代英汉综合大词典》
adv.令人信服地,确凿地
  • All this proves conclusively that she couldn't have known the truth. 这一切无可置疑地证明她不可能知道真相。 来自《简明英汉词典》
  • From the facts,he was able to determine conclusively that the death was not a suicide. 根据这些事实他断定这起死亡事件并非自杀。 来自《简明英汉词典》
学英语单词
abamperes
Alfredia acantholepis
Allium sacculiferum
anaerobe
anaphylactic intoxication
aquae redestillata
assistant principal
attention-seekings
background luminance sensor
be all one to
blueishest
burrises
can't-wait
censorizing
co-managements
commandists
corticopupillary reflex
coyves
decay-affected selectivity
deluging
dentate fissure
development threshold
DEVGRU
dopiest
Downtownian
eccrine angiomatous nevus
electropneumatic positioner
english departments
estivoautumnal(malaria)
evenly distributed
federal governments
filling area
Fluoromebendzole
foraminite
furuncular diathesis
goddang
hanging down
having in
hear warning bells
heliozoans
Hydraulic Rams
hydrolytic cleavage
impropriety
in-yede
intracluster medium
island delta
kammes
Karagaylinskiy
lease-backs
leslie cheung
mass storage disc
Maytiguid I.
mel'nikov
membrane of stapes
microdicks
midgardsormen
mixture optimum
mournfullest
Myorelaxin
myselfe
nephelite (nepheline)
non-H share Mainland private enterprise
not ready for prime time
obsolete activity
ore extraction
ossa Sylvii
paper document
Passate
photodimer
plane up
population pyramid
portery
Pretty Prairie
progressive atrophe of bone
protective legislation
protohominids
pycnometric method
quantum energy table
reciprocating expansion-engine
resin blush
right side engine
sales van
scale trace
scribbling
single spark-plug ignition
sinistrality
solid nibium electrolytic capacitor
straight-line type automatic sampler
strong army horse
submarginally
subvariance
suppression of image signal
the KKK
the top flight
unvisored
Valkeala
vibrating-reed meter
When I die,the world dies with me.
When this is prescribed
whistlin
White's operation
Yambean