时间:2019-01-02 作者:英语课 分类:60秒科学


英语课

Water Blankets Forming Planets

A study in the journal Science finds much more molecular 1 water in regions where planets are forming around young stars. The mechanism 2 to keep the water from being destroyed by UV radiation appears to involve some of the water molecules 3 shielding the rest. Cynthia Graber reports


In 2008 astronomers 4 discovered surprising amounts of water molecules where planets were forming near young stars. But how, they wondered, could those molecules survive? They should have been destroyed by ultraviolet radiation. In theory, planetary dust could block out UV rays, but the dust was bound up in the creation of those young planets. So what's protecting the water? Now researchers at the University of Michigan believe they have the answer, which they published in the December 18th edition of the journal Science.


The regions where planets are being created are incredibly chemically productive, rapidly generating new compounds. According to the researchers, some water molecules surround the almost-planet dust and act as almost a sacrificial layer. The water molecules absorb the ultraviolet rays—and, though those molecules are destroyed, the embryonic 5 planet is shielded. And the region is producing water faster than the protective layer is being destroyed.


The scientists say this action is similar to our ozone 6 layer, which blankets us with protective shielding from UV radiation. They tested this idea in computer models and found that the results mirrored the observations. Seems that having water when a planet’s finished requires sacrificing some in the process.

 



adj.分子的;克分子的
  • The research will provide direct insight into molecular mechanisms.这项研究将使人能够直接地了解分子的机理。
  • For the pressure to become zero, molecular bombardment must cease.当压强趋近于零时,分子的碰撞就停止了。
n.机械装置;机构,结构
  • The bones and muscles are parts of the mechanism of the body.骨骼和肌肉是人体的组成部件。
  • The mechanism of the machine is very complicated.这台机器的结构是非常复杂的。
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。
n.天文学者,天文学家( astronomer的名词复数 )
  • Astronomers can accurately foretell the date,time,and length of future eclipses. 天文学家能精确地预告未来日食月食的日期、时刻和时长。 来自《简明英汉词典》
  • Astronomers used to ask why only Saturn has rings. 天文学家们过去一直感到奇怪,为什么只有土星有光环。 来自《简明英汉词典》
adj.胚胎的
  • It is still in an embryonic stage.它还处于萌芽阶段。
  • The plan,as yet,only exists in embryonic form.这个计划迄今为止还只是在酝酿之中。
n.臭氧,新鲜空气
  • The ozone layer is a protective layer around the planet Earth.臭氧层是地球的保护层。
  • The capacity of ozone can adjust according of requirement.臭氧的产量可根据需要或调节。
标签: 60秒科学 Blanket
学英语单词
a few years ago
adiabatic atmosphere
alcoholic beverage industry
all if
american plate
ammonistion
Anār Darreh, Daryā-ye
azur-
balula
bimirror
bivariate Poisson distribution
bright rim structures
bring with
Bysantin
camera cable
cantarero
cast in a lawsuit
ceorl
chantreux
Christmas tree bill
compound fabric
concertato
condenser coupling amplifier
Corydalis cavei
Coucouron
crime of torture
crown sardine
cyclic behaviour
daughter card
depositing money
dewyce
doughnut bumper
electronic programmer
envisionment
flux dip fill-up
Fremont Center
fuqqing
Gasperina
gluelumps
grave dancing
hammermeister
hand worker
header capacitance
HEPT
hosing dyeing machine
IASS
inextensional buckling
interleukin-4(IL-4)
joint squaring tool
Kaspiyskoye More
key fossil
kugelman
lavendul
lencis
light house duse
limonia (dicranomyia) fullowayi
manual chain-driven carrier
mearsen
MESAR
mousquetaire gloves
muscle power
nephros function meter
nigration
non-rapid eye movement sleep (nrem sleep)
objectstaff
over damp
pimento red
plotter interface
presser foot lifter
public land mobile network
raciborz
rated
reduced speed
resistin
resonance acceleration
retection
reverse gear shifter shaft
reverse latch
ricards
rubbing from stone inscription
run-time support library
Sayanskiy Rayon
schate
Schlemm's canal
sequential chart
serrae
Sevier County
Sikan
snow job
soldered tooth
solid puncture
Sorraia, R.
spermous
star-connected motor
strategy map
strumpeted
Tarplee
tightnesses
titration of halide
unaco
undertaked
Wetbike