[网络] 拓宽视野眼界;大开眼界

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(168) / 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(186) / 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(176) / 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(163) / 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(148) / 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(194) / 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(201) / 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(180) / 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(149) / 评论(0) 分类 2016年NPR美国国家公共电台10月

Hello ,boys and girls.my name is Rechew.Write.I have a big family.there are four people including my father, mother one brother and myself.I have beendeeply influence by my family and I am concerned about the love between my family numbers.I'm the k

发表于:2018-12-26 / 阅读(129) / 评论(0) 分类 想聊就聊

Read. When you feel bored. When you feel alone. When you want to travel. Reading is the cheapest way to experience everything. You can open your mind and heart, it will broaden your horizon The ticket to travel the world read. 当你觉得无聊,可以

发表于:2018-12-29 / 阅读(131) / 评论(0) 分类 瞬间秒杀听力

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(169) / 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(194) / 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(176) / 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(204) / 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(209) / 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(198) / 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(191) / 评论(0) 分类 火星生命

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(176) / 评论(0) 分类 2018年NPR美国国家公共电台4月

9. What's your opinion about the price? 你对价格有什么看法? 还能这样说: What do you think about the price? How do you feel about the price? 应用解析: be of the opinion that 主张,认为。 例如:I'm of the opinion that h

发表于:2019-01-21 / 阅读(93) / 评论(0) 分类 情景会话口袋书人际篇
学英语单词
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air way
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as hard as granite
back scissors
bona fide paper
british-leds
california buckthorns
cat-o-nine
coast of subsidence
colour standards
corrected bearing
crathon
crumbed
customer service department
days man
dental casting machine
develop into
diabol-
dieck
dimension of analytic set
dinaphthalene
districtness
dynamic storage area
Explorer Scout
filament of thermionic valve
fitness cost
flux-line corrosion
fog clearing
gaurax piceus
gonad capsule
gorge oneself with
gratication
hairbrush cactus
heat-forming food
hemidactyl
homolat
hoop-skirt
how high
hydraulic fluid chamber
i'alcool
in allusion to
institutional buying
lateral bud
locking escape
Maibud
makhnoes
Mealy Mts.
mean equatorial moment of inertia
metamaterial
natural-language recognition
niter assay
old wives' story
on range
one-parameter group
onthophagus (onthophagus) rugulosus
orcharding
oxygen-poor layer
pantamorphic
parallel detection system
permanent loop junctor
PHCM
powdered bakelite plate
press back
proboscis
quigly
r. bronchialis eparterialis
rect-
recusancies
refactorable
refracture index
responsible
return and compensate
Saxifraga saxicola
scullers
self-teach
shakes out
shrubby
splenic panhematopenia
superior bulb of internal jugular vein
sympathetic formative cells
talk through her neck
TCID50
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tower block
trial maneuver
UHBI
UNESCO
unsettled leasing contracts
Vacutainer
valley migration
vapourizability
variety meats
verified data
virtual communities
virulent bacteria
waken from
warm-up period
widths
wind pulse-vibration factor
yol
youthened