时间:2019-01-03 作者:英语课 分类:VOA2004(下)--健康科技


英语课


 


By Jessica Berman


The U.S. space agency has released the first close-up pictures of Titan, Saturn 1's secretive, giant moon. Photos from the international Cassini spacecraft show the orbiting object shrouded 2 in haze 3, and astronomers 4 say the new images do not answer many questions surrounding the mysterious moon.


The images of Titan's hazy 5 atmosphere are part of the four-year Cassini mission to Saturn. Initial images taken from a distance of 1,200 kilometers, the closest any spacecraft has ever gotten to Titan, show smog shrouding 6 the moon's surface.


The new images, while clearer than those of the past, still don't reveal much more about Saturn's biggest moon than was previously 7 known. Scientists believe Titan's atmosphere is similar to that of early Earth, and they want to study it to learn about the sort of chemistry that might have existed just before life on Earth began.


The leader of the Cassini imaging team, Carolyn Porco, says astronomers still have a long way to go to learn what's beneath Titan's haze.


"I'm not surprised we're having such a difficult time interpreting what's on the surface because remember this is an environment that we've never seen before," said Carolyn Porco. "It's not like we're visiting another airless body, and we have a lot of experience in interpreting airless bodies, all those methods of examining solid surfaces from planetary spacecraft that we have learned over the last half century. We can't use that on Titan because it's a very different environment. The materials it's made of are alien."


Ms. Porco says there are several surface features that appear to have sharp boundaries, but scientists can't distinguish them and they can't tell whether the surface is rugged 8 or smooth.


Also, astronomers saw clouds moving very slowly over the moon's southern pole at the same time that it appears winds whip quickly across Titan's surface.


The mission is one of 45 planned flybys of Titan - some even closer - during Cassini's four-year tour of Saturn and its moons and rings. Later this year Cassini will deploy 9 a European Space Agency probe, named Huygens, that will descend 10 to the surface of Titan in January.


Jessica Berman, VOA News, Washington.


注释:
shroud 掩盖
haze 薄雾
spacecraft 太空船
beneath 在……之下
interpret 解说
planetary 行星的
alien 不相容的
boundary 分界线
flyby 飞越
descend 下降



n.农神,土星
  • 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。
  • These comparisons suggested that Saturn is made of lighter materials.这些比较告诉我们,土星由较轻的物质构成。
v.隐瞒( shroud的过去式和过去分词 );保密
  • The hills were shrouded in mist . 这些小山被笼罩在薄雾之中。
  • The towers were shrouded in mist. 城楼被蒙上薄雾。 来自《简明英汉词典》
n.霾,烟雾;懵懂,迷糊;vi.(over)变模糊
  • I couldn't see her through the haze of smoke.在烟雾弥漫中,我看不见她。
  • He often lives in a haze of whisky.他常常是在威士忌的懵懂醉意中度过的。
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.有薄雾的,朦胧的;不肯定的,模糊的
  • We couldn't see far because it was so hazy.雾气蒙蒙妨碍了我们的视线。
  • I have a hazy memory of those early years.对那些早先的岁月我有着朦胧的记忆。
n.覆盖v.隐瞒( shroud的现在分词 );保密
  • The mist shrouding the walley had lifted. 笼罩山谷的雾霭散去了。 来自《简明英汉词典》
  • A dark stubble was shrouding his strong jaw and dimpled chin. 硕大有凹陷的下巴上满是深色的短须。 来自互联网
adv.以前,先前(地)
  • The bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。
  • Let me digress for a moment and explain what had happened previously.让我岔开一会儿,解释原先发生了什么。
adj.高低不平的,粗糙的,粗壮的,强健的
  • Football players must be rugged.足球运动员必须健壮。
  • The Rocky Mountains have rugged mountains and roads.落基山脉有崇山峻岭和崎岖不平的道路。
v.(军)散开成战斗队形,布置,展开
  • The infantry began to deploy at dawn.步兵黎明时开始进入战斗位置。
  • The president said he had no intention of deploying ground troops.总统称并不打算部署地面部队。
vt./vi.传下来,下来,下降
  • I hope the grace of God would descend on me.我期望上帝的恩惠。
  • We're not going to descend to such methods.我们不会沦落到使用这种手段。
学英语单词
2-bromopropane
acetochloral
acro-cephalosyndactyly
addicts
alvidrez
androgynism
Androni
annualus
anti-cyclin
arbo
arc-weld
as we say
attitude (of strata)
Auger electron spectrometry
back action
battens
be discharged from prison
beatenness
bevel-angle
buffer intensity
burn-off chamber
car hoist and body stands
cloud OS
continuous upseting
control experiments
coordination number
copper minimum content
Cost of Cleaning Pollutants from Ships
Custer City
cylinder casting
data loop transceiver (dlt)
Doppler bank
dynamic loss tensile modulus
electric line of force
farinhas
fastness to heat
five-wire system
flammete
fleece lined
foreign currency statement
fuel lattice
Fulsed
gap-filler input
gaster
generation time
giroflee
gushiness
heartwell
hematopenia
ingrates
integrated square
isobrachial
Kaliningradskiy Zaliv
kerato-iridocyclitis
keyboard lock state
kostelic
laciniatas
least absolute deviation fit
leucodrin
likeglobin
locks her up
maculotriton serrialis
magnetic energy density of magnetostatic field
Melia azedarach L.
metallic color
metric capacity units
milked-fever
no-return point
normal gastric acid curve
not yet due
particulate composite material
Pasteurella septica
payard
pentapetalus
phenoplasts
pollution-related disease
portable automaic data recording equipment
poster paper
preset prism
prevailing visibility
problem statement analizer
regarding henry
rock wreath
saccule
Salmon Bank
scleral ring
scrab
settlement movement
Siheung
soak
steel motor lifeboat
straight tooth
strontium bisulfate
syncephalastrum racemosum
tangshans
tarred-and-feathered
technical economics of forestry
the Keeper of the Exchange and Mint
timing filter amplifier
tixt
Ust-Amginskoye
warp ikat