自动地平仪

O: are you ready for your first driving lesson? S: yes. Which one is the brake again? O: the pedal on your left is the brake and the one on your right is the gas. S: Im glad this car is an automatic. I don't like having to change gears. O: automatics

发表于:2018-11-30 / 阅读(191) / 评论(0) 分类 生活英语情景口语

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(119) / 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(149) / 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(118) / 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(110) / 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(105) / 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(132) / 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(137) / 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(133) / 评论(0) 分类 火星生命

Quarter in a payphone Drying laundry on the line Watching sun tea in the window Pocket watch, tellin' time Seems like only yesterday, I'd get a blank cassette Record the country countdown, 'cause I couldn't buy it yet If we drove all the way to Dalla

发表于:2018-12-08 / 阅读(163) / 评论(0) 分类 格莱美获奖歌曲

'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(103) / 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(119) / 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(142) / 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(133) / 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(152) / 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(160) / 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(156) / 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(146) / 评论(0) 分类 火星生命

Automatic US Spending Cuts Loom Under current U.S. law, automatic cuts to domestic programs and national defense will begin in 2013, because a congressional committee failed to agree on trimming Americas federal deficit. Already, many lawmakers say t

发表于:2019-01-10 / 阅读(177) / 评论(0) 分类 VOA标准英语2011年(十一月)

今天我们要学的词是 automatic。Automatic 自动的。semi-automatic rifle 半自动步枪。If the Congress doesn't take action soon, automatic spending cuts will take effect on March 1st. 如果国会不马上采取行动的话,政府削减

发表于:2019-01-11 / 阅读(136) / 评论(0) 分类 英语单词荟萃
学英语单词
a load of
acrosome vesicle
affiliated corporation
air-passenger
alkaline batteries
allowance for uncollectable accounts
Amilon
Anare Mountains
associated costs
astrothelium variolosum
back to back duplex bearing
barred right
base-borns
Bologninl's symptom
cathode-ray voltmeter
Celto-Germanic
CHSD
cisaconitic acid
classical differential geometry
collectibility
contline
contortion
coving
crescive institution
cyclic load
cyclothymidine
cylindroconical
Day's factor
dc coupled flipflop
diffused surround
Director of Audit
duck egg
electrician's hammer
Elzach
engine stand
estter
Exchange, trunk.
expired article
field-generated current
flat-iron boat
flexible benefits
foreign sub subsidiary
front sheet metal
glomerule
gratinating
growth-enhancing
Guarneri, Andrea
hammer head bolt
high-pressure rotor speed
hydrocholine
indian rock fill dam
individual preferences
iraqite
Jessamine County
K8
Labutta
leaving bodily
long-term crediter
magnetorotation
makoni
medioplantar reflex
melodramatisation
method of procedure
micronets
minimum cathode current
modale
more honoured in the breach than in the observance
muddled on
multichamber fluidized bed
near field backscatter
oil someone's fist
oppositional otherness
paisanos
Phanerotoma
physical task saturation
pitch of nails
power of attorney
purchasing forecast
rCMRglc
repd.
revocable offer
ruled line & short zigzag
scuff
seamless casing
Seed-quantity
semen bank
semen cardamomi
shaft power
short landed goods
short run casting
silk faille
single bobbin reel
soldier-poet
supersaturation
thermal reaction
trifilar wire
Tylose
vertical shaft rotary plough
waveguide branching filter
William Hubbs Rehnquist
yellow trade union
zooxanthellate frame-builders