时间:2019-01-23 作者:英语课 分类:探索与发现2014年


英语课

 So was this a near miss for us?


 
If the asteroid 1 had been in a different part of its orbit, so it didn’t hit this year but it hit next year, it would have still hit us on February 15th. But instead of coming in over Russia, it would have come in over the UK and Ireland and would have entered the Earth’s atmosphere, in fact, entered the North Atlantic Ocean. 
 
In order for the meteorite 2 to strike anywhere near Britain, our paths through space would have had to be fundamentally different. So we know where asteroids 3 come from and the forces that shape their date with destiny. But what exactly happens next? The moment that a meteor strikes? And what determines just how devastating 4 that strike will be?
 
When the Chelyabinsk meteor reached our atmosphere, it was travelling at more than 65,000 kilometres per hour and measured more than 15 metres across. Apart from some unconfirmed reports of craters 5 at the bottom of Lake Chebarkul, there’s surprisingly few signs of an impact. Little of the 7,000 tonnes of space rock that entered the atmosphere have been recovered. Perhaps 300 fragments. And yet, the effects were felt over 3,000 square kilometres. 
 
The question is how can apparently 6 so little do so much harm? There’s a clue from the last time Earth experienced a meteor strike on this scale. 

n.小行星;海盘车(动物)
  • Astronomers have yet to witness an asteroid impact with another planet.天文学家还没有目击过小行星撞击其它行星。
  • It's very unlikely that an asteroid will crash into Earth but the danger exists.小行星撞地球的可能性很小,但这样的危险还是存在的。
n.陨石;流星
  • The meteorite in Jilin Exhibition Hall is believed to be the largest in the world.吉林展览馆的陨石被认为是世界上最大的。
  • The famous Murchison meteorite smashed into the Australian ground in 1969.1969年著名的默奇森陨石轰然坠落在澳大利亚。
n.小行星( asteroid的名词复数 );海盘车,海星
  • Asteroids,also known as "minor planets",are numerous in the outer space. 小行星,亦称为“小型行星”,在外太空中不计其数。
  • Most stars probably have their quota of planets, meteorids, comets, and asteroids. 多数恒星也许还拥有若干行星、流星、彗星和小行星。
adj.毁灭性的,令人震惊的,强有力的
  • It is the most devastating storm in 20 years.这是20年来破坏性最大的风暴。
  • Affairs do have a devastating effect on marriages.婚外情确实会对婚姻造成毁灭性的影响。
n.火山口( crater的名词复数 );弹坑等
  • Small meteorites have left impact craters all over the planet's surface. 这个行星的表面布满了小块陨石留下的撞击坑。 来自《简明英汉词典》
  • The battlefield was full of craters made by exploding shells. 战场上布满弹坑。 来自《现代英汉综合大词典》
adv.显然地;表面上,似乎
  • An apparently blind alley leads suddenly into an open space.山穷水尽,豁然开朗。
  • He was apparently much surprised at the news.他对那个消息显然感到十分惊异。
学英语单词
abeqithymia
Abies firma
access system
alternate host parasites
analysis of agricultural data
azo dyeing
backup-archive client
barnette
Burgaly
center-work
chickenarian
churn of wave
cleaner strainer
cleanhandedly
come pat to
coolant-gas-carrying auxiliary system
copy order
crackerbreads
crossapol b.
cut and fill balance
Daddy Warbucks
Dakshina Kannada
Dettingen an der Erms
Didelphidae
dual liquid applicator
dyestuffs
eleutherol
epineural canal
ERL-080
evictors
fasting pen
Fery cell
flocculent suspension
flow audit procedure
four hand
frances elizabeth caroline willards
friendish
graphic user world
greenthumb
Greetland
Grodzisk
hemachates
hermann ludwig ferdinand von helmholtzs
impanating
import and export merchant
inductance type displacement transducer
lamp socket antenna
Leptinotarsa
line of trend
livid brown
lounsbery
Mantoux reversion
maximum cruising rating
mean engine operating time between failures
mokopuna
monthly settlement report
ninety-day wonders
non-basic activity
noncorrect
None so deaf as those who won't hear.
odo(u)r specialist cell
Ooststellingwerf
optical fiber phase conductor
otto robert frisches
palm-presser
paraffin oil
pig liver
pissing contest
plumeries
polychloroprene foam
progressive rotation
quinochrome
R.F.T. typing
recent amnesia
reinforcing girder
retinal epilepsy
S tectonite
Saxifraga tigrina
selling process
serial analysis
shifting executory interest
sock something away
socked
sogier
Sophora brachygyna
squirrel cage mill
stangl
statistical invariance
steel tube armour
superstimuli
survey boat
three-shear ram
time-varying gradient
traquair
tricyclohexyltin hydroxide
Turkifies
vertigo
vesperae
Wagner's operation
waterproofing plaster coat
WVV