时间:2018-12-24 作者:英语课 分类:Scientific American(五)月


英语课

This Scientific American’s 60-Second Science. I am Karen Hopkin. This will just take a minute.


They say that older folks benefit from spending time with young people. And that’s not just an excuse to stick grandma at the kids’ table at Thanksgiving. Now scientists have found that, even in insects, seniors live longer when they socialize with the young. The researchers were studying fruit flies that, because of a particular mutation 1, have a drastically reduced lifespan. When those mutants live together in a Big Brother style fly dormitory they only last an average of 9 days. But the scientists found that when they allowed older mutants to share space with hip 2, young, wild-type flies, they survived nearly twice as long. The results appear in the May 27th issue of the Proceedings 3 of the National Academy of Sciences. Old mutants who roomed with spry regular flies also dealt better with stress than their friends who bunked 4 in the Mutant Only dorm. They withstood being overheated, dusted with paraquat, even shaken violently twice a day. By studying these flies, the researchers hope to identify any molecules 5 responsible for this youth-associated lifespan extension. Then grandma won’t actually have to sit with the kiddies. She could pop a pill and stay spry while hanging with her peeps.


Thanks for the minute for Scientific American’s 60-Second Science. I am Karen Hopkin.



1 mutation
n.变化,变异,转变
  • People who have this mutation need less sleep than others.有这种突变的人需要的睡眠比其他人少。
  • So far the discussion has centered entirely around mutation in the strict sense.到目前为止,严格来讲,讨论完全集中于围绕突变问题上。
2 hip
n.臀部,髋;屋脊
  • The thigh bone is connected to the hip bone.股骨连着髋骨。
  • The new coats blouse gracefully above the hip line.新外套在臀围线上优美地打着褶皱。
3 proceedings
n.进程,过程,议程;诉讼(程序);公报
  • He was released on bail pending committal proceedings. 他交保获释正在候审。
  • to initiate legal proceedings against sb 对某人提起诉讼
4 bunked
v.(车、船等倚壁而设的)铺位( bunk的过去式和过去分词 );空话,废话
  • He bunked with a friend for the night. 他和一个朋友同睡一张床过夜。 来自《现代英汉综合大词典》
  • We bunked in an old barn. 我们将就着睡在旧谷仓里。 来自辞典例句
5 molecules
分子( molecule的名词复数 )
  • The structure of molecules can be seen under an electron microscope. 分子的结构可在电子显微镜下观察到。
  • Inside the reactor the large molecules are cracked into smaller molecules. 在反应堆里,大分子裂变为小分子。
标签: SSS mutation
学英语单词
'ighness
a pooch
adjusting gear
adorated
ampin-penicillin
ballistic missile (bm)
bonus wage
botargo
Chelsea boots
Childress County
clipping planes
closely-knit
contouring tracer
crisis management team
daily crude capacity
dash sb's hopes
Dautie.
Definitory
doeskin weave
double graphite sleeve
drm
e-learner
eavesdroppers and the like
Einstein-Rosen waves
electric bridge coupler
enarm
etherialise
eversion of punctum
examination of vulva
fast fashion
ficedula narcissina elisae
fluorophotometry
fractional terminator
freezing pan
FWIV (feedwater isolation valve)
gear reduction unit
geriodontist
heat dissipation rate
heat pickup
homeschoolers
hospitalenkoside
hyperoxymuriate
insignificantly
intermediate quantity
introspections
Japetus
Kamphaeng, Khao
lengthsmen
liberalization of interest rate
line turn around delay
log-
made a advance
makes use of
mammalogies
Martoli
master control gate
Miramont
mis-managements
mixmaster
morphophonemes
nicolas-durand-favre(disease)
non-mendelian heredity
noninstitute clause
nontherapy
op-eds
otites
oxytropis yunnanensis franch.
penetrating progeny
permanent difference
polynactin
portable diagnostic X-ray unit
portable seismic recorder
proteaceaes
pseudocolor
public loan
pyocyanobacterin
rag sorting loft
rear-mounted toolbar
refashions
retransliterate
secondary air pollutant
semiconductor heterojunctions
Sinosenecio hainanensis
solid load
st.-louis
stock-picking
straight through processing
summary treatments
system-level simulation
the whole ball of wax
Tolais
transaction-oriented processing system
transsphenoidal surgery of pituitary fossa tumors
triple barrel pump
Tyrma
unguentum simplex
unlabelled common storage
Vördhufell
water sealed bearing
whisman
xeriscaped
xier