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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(134) / 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(158) / 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(127) / 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(118) / 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(116) / 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(146) / 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(154) / 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(144) / 评论(0) 分类 火星生命

三、写英文简历注意事项 从上面可以看出,总体说来英文简历的格式其实很简单,主要包括以下四部分: Name、 Address、 Tel、E-mail、Objective Summary、Profes

发表于:2018-12-08 / 阅读(112) / 评论(0) 分类 实用英语

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(136) / 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(153) / 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(143) / 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(165) / 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(174) / 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(170) / 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(157) / 评论(0) 分类 火星生命

The Department of State has designated Qassim Abdullah Ali Ahmed, also known as Qassim al-Muamen, as a Specially Designated Global Terrorist under Executive Order 13224. This designation imposes sanctions on foreign persons who have committed, or pos

发表于:2019-01-03 / 阅读(139) / 评论(0) 分类 VOA标准英语2018年(八月)

Topics - Betty Friedan and The Feminine Mystique; Taos Pueblos; admist versus among versus between; stuck in reverse; to keep minutes to lose hours Words: womens rights movement advocate society mystique feminine homemaker synonymous with to inhabit

发表于:2019-01-22 / 阅读(133) / 评论(0) 分类 美语听力 English Cafe

President Barack Obama said Tuesday that he intended to take communist Cuba off the United States' list of state sponsors of terrorism, part of his effort to normalize relations with the island nation after five decades of hostilities. The American l

发表于:2019-02-18 / 阅读(103) / 评论(0) 分类 英语新闻

CD Player While shopping for my first CD player, I was able to decipher most of the technicalese on the promotional signs. One designation had me puzzled, though, so I called over a salesperson and asked, What does 'hybrid pulse D/A converter' mean?

发表于:2019-03-11 / 阅读(293) / 评论(0) 分类 趣味英语
学英语单词
a cookie
a possessory action
Actinidia arisanensis
advanced contribution
alter cycle control
an absolute cert
antifriction ring and holder
antinudity
auditory senses
batch culture
benzylidene bromide
bevel
butyric acid amide
cap stopper
Chappell Is.
chapter book
cinildipine
compensated-loop direction finder
competent policy
control signal box
croin
cuculla
demitri
derailments
derivatives markets
determination of distance
ecumene (oecumence)
efficiency-based personnel allocation method
eleotris oxycephala
epidemic diarrhea of nemborn
exobasidium hemisphaericum shirai
FDLP
Ferwerd
field kit
Filippi's glands
fireeaters
FM-B
Format disk
Gary Cooper
gas-solid interface
gilded cages
grassing up
greyhound-racing
halftone etching
hearing dog
helicopter view
hibiscus farrageis
honey crisps
in his infancy
incroacheth
index of leading economic indicators
legend plate
light interference
lignoses
louser
low-pressure facies series
mariane
Mephistopheles
microroughened
milanov
minimal medium
motion paths
municipal wastewater plant
Nabule
Neoemedyl
Nervus pudendus
non-graded sediments
oldest-old
outfiring
paleo-calcite
paranal fork
pepe pliers
per thousand
Pertang, Sungai
pick-up chain
pin connector
plywood box
polyglot
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radan
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recorder impedance roller
reussite
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Saxegothaea
shortgrasses
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spurge nettles
static calculation
string tension
subcreators
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trilinear
Tripetalae
universal function unit
vaccinable
without a word
Worcs
world commerce
worst-casest