音标:[,di:hə'raizən] ;
n. 【地质学】D层,心土层

Into the West Lay down your sweet and 1)weary head Night is falling You’ve come to journey’s end Sleep now Dream of the ones who came before They are calling From across the distant shore Why do y

发表于:2018-11-28 / 阅读(163) / 评论(0) 分类 疯狂英语2004年

Conditions on Mars were so harsh that it was hard to imagine any life surviving there. The idea of sophisticated aliens was wiped out. We know that conditions on Mars today are not very good for life.

发表于:2018-12-07 / 阅读(78) / 评论(0) 分类 火星生命

These discoveries raised the stakes. Here was a planet similar to our own. Mars might not have cities or civilizations. But it could be home to other smaller life forms like microbes. Chris McKay is N

发表于:2018-12-07 / 阅读(104) / 评论(0) 分类 火星生命

I think it is exciting. Because it would imply that if life arose independently on Mars. The implication is that life is pervasive throughout the universe. This is why Mars has so obsessed scientists.

发表于:2018-12-07 / 阅读(79) / 评论(0) 分类 火星生命

In 2001 a new NASA probe was launched. Called Odyssey, it was sent to Mars to carry out the most detailed analysis ever of the planet’s surface. What it has discovered may be about to answer one of

发表于:2018-12-07 / 阅读(66) / 评论(0) 分类 火星生命

But even if there had been water, life doesn't start overnight. Even a simple microbe is the product of complex chemical systems that take millions of years to evolve. Had the water lasted long enough

发表于:2018-12-07 / 阅读(71) / 评论(0) 分类 火星生命

Rice had seen the same thing in Iceland, one of the few places on Earth with similarities to Mars. It too is extremely cold, and most of the water is frozen into glaciers. And also like Mars, buried u

发表于:2018-12-07 / 阅读(81) / 评论(0) 分类 火星生命

For Mars to have rivers, it must once have had streams, rain, clouds and an atmosphere, a planet just like the Earth today-if these were rivers. They had to be sure. The answers would come in 1998 wit

发表于:2018-12-07 / 阅读(94) / 评论(0) 分类 火星生命

William Boynton is professor of planetary sciences at the University of Arizona. And he's dedicated his life to looking for water on Mars. The link between life and water is very strong. Even here in

发表于:2018-12-07 / 阅读(97) / 评论(0) 分类 火星生命

'Deepwater Horizon' Honors The Sacrifice Without Sacrificing The Action play pause stop mute unmute max volume 00:0003:02repeat repeat off Update Required To play the media you will need to either update your browser to a recent version or update you

发表于:2018-12-18 / 阅读(67) / 评论(0) 分类 2016年NPR美国国家公共电台10月

Of course, any terraforming is still a long way off. The next few expeditions to Mars will definitely be made by machines. NASA, are sending 2 rovers, capable of travelling over 100 meters a day in se

发表于:2019-01-02 / 阅读(85) / 评论(0) 分类 火星生命

Well, hearing that Odyssey had found subsurface water on Mars was enormously exciting for somebody who is involved in planning to send humans to Mars. Water has a number of important uses for us. At t

发表于:2019-01-02 / 阅读(108) / 评论(0) 分类 火星生命

Life on Earth is basically proteins and DNA, so we can wonder if there is life on Mars will also be DNA and proteins, the same type of DNA, the same type of proteins. One might think that DNA is such

发表于:2019-01-02 / 阅读(95) / 评论(0) 分类 火星生命

But there was something even better. Odyssey may not just have found ice. There may also be liquid water, and that means, there could be living creatures there too. Right now, there might be liquid wa

发表于:2019-01-02 / 阅读(111) / 评论(0) 分类 火星生命

But they never got there. The first disappeared into deep space. Another missed its target when its coordinates were confused. One NASA control center was working in metric, the other in feet and inch

发表于:2019-01-02 / 阅读(109) / 评论(0) 分类 火星生命

The ground here is permafrost, a mixture of soil and ice frozen together. A group of Russian scientists have teamed up with NASA to drill down into it in search of microorganisms. It's work that's bee

发表于:2019-01-02 / 阅读(108) / 评论(0) 分类 火星生命

One of these wavelengths corresponds to hydrogen, another wavelength would be iron. Another wavelength would be oxygen. And so you go to the part of the spectrum you are interested in and you see you'

发表于:2019-01-02 / 阅读(105) / 评论(0) 分类 火星生命

If we look at the sky on a perfectly fine summers day we shall find that the blue colour is the most pure and intense overhead, and when looking high up in a direction opposite to the sun. Near the horizon it is always less bright, while in the regio

发表于:2019-01-08 / 阅读(97) / 评论(0) 分类 英语美文

RACHEL MARTIN, HOST: Eight years ago today, an explosion on the Deepwater Horizon drilling rig killed 11 people and led to a massive oil spill in the Gulf of Mexico. The accident prompted big changes in how the country regulates offshore drilling. No

发表于:2019-01-16 / 阅读(76) / 评论(0) 分类 2018年NPR美国国家公共电台4月

模仿句子:But there is also another voice on the horizon, a new champion for a different way of thinking. 原文翻译:但目前还有另外的声音,主张捍卫新的思维方式。

发表于:2019-01-23 / 阅读(57) / 评论(0) 分类 英音模仿秀
学英语单词
acid-proof slab
air bacteria
all kind kept in stock
ancient chinese literature
angular leaf spot of tobacco
arteriae anastomotica
bacterial wilt of cucumber
barnard
basal spacing
be in gaol
belyaev
Black Mountain
blackcurranties
capillary isoelectric focusing
CCGC
cephalalgia reflexa
Claerwen Res.
collective ownership by the working people
contact height
dad burn
dewatering setup
Dieciocho de Julio
differential flow indicator
eigenpotentials
exogenous variate
exoroot nutrition
fact sheet
fiscal institution
fixed duty
footlid
formula of capitalization
full-wave amplifier
gas-distributing channel
gentiana davidii formosana
genus cimexes
get cold feet
glitter
gorals
green linnet
heteromorphic chromosomes
high temperature rapid firing
high-rank graywacke
holguin
hyperwriting
interganglionic branches
interior syndrome
kmet
Kyowamycin
large scaled cartography
lay steel
Louys, Pierre
made yourselves understood
magics up
make meat of someone
marine surveyor
middle C
miscible drive
multicycle data entry
nuclei tuberes
oleum rosmarini
ooparts
Oude-Tonge
parametric subroutine
pecuniary reward
Polygala tricornis
private affair
projectionometer
protolignin
quantit ative heredity
rames
rereplications
rollens
somatic radiation damage
something's up
spiral bevel gear milling machine
St-Sever-Calvados
Statute Theory
steps type seal
storehouses
subluxationofatlantoaxialjoint
subrogated
sweeps up
sympathetic neuroblast
tapered screw press
tavels
theta temperature
thiamines
tombaugh
transfer between orbits
trap nest
trapezia digitalis
Trinidad and Tobago dollar
turnover of receivable
ultrasonic interferometer
unwindase
upper-mantle
urethrographically
Vaglio Basilicata
velarize
veran
vesiglandin
woman's reason