发生层分化

Speaking Sparkles (2) 妙语连珠 1. Well, let's say, you know, life is a constant learning process and I encourage everybody who is watching or 1) participating to constantly think about lifetime le

发表于:2018-11-28 / 阅读(232) / 评论(0) 分类 疯狂英语2003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(141) / 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(164) / 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(139) / 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(130) / 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(123) / 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(159) / 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(163) / 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(152) / 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(126) / 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(142) / 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(162) / 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(152) / 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(171) / 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(181) / 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(175) / 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(165) / 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(150) / 评论(0) 分类 2018年NPR美国国家公共电台4月

创业者需要记住的15句话 又到一年毕业季,面对现在高校毕业生惨淡的就业形势,一些毕业生选择了自主创业,为自己打工。下面是15句对创业者的忠告,你可以说给你打算创业的同学听听。

发表于:2019-01-23 / 阅读(179) / 评论(0) 分类 实用英语

1. Be slow to hire and quick to fire. 招人要慎重,炒人要迅速。 2. Create the best environment you can for your team. 为你的团队创造最好的工作环境。 3. Companies aren't just about profits. 开公司不仅仅是为了钱。 4

发表于:2019-02-13 / 阅读(143) / 评论(0) 分类 实用英语
学英语单词
acoustic coupler operation
aminium ions
amyl triethyl silicane
anahormone
angular tacheometry
antholysis
aposematic colo(u)r
Ban Hin Heup
barath
batiks
benzoin
Bergman-Turner unit
beslobbers
bobbin winder tension disc spring
cadmium-base alloy
call out
came about
carine
Center for Law and Social Policy
chi - square test
Chubb method
computable data type
conduction type furnace
cut-in pressure
cystic endometrial hyperplasia
deadly compound
demand draft rate
deynous
die game
dilatometry
direct inward dialing
discus interpubicus
dispositios
dlek
dunderberg
economy class passenger
effective interest income
electromagnetic action
expend
games console
global surveillance system
goldeny
Great Cold
great staff
guaiacol carbonate kefir
halme basifusca
heat barriers
hedge-clippers
hydride cell (colloidal metal cell)
in-tense
industrial injury benefit
Kelvin, William Thomson
kinghans
Kotri Barrage
latching mechanism
liquid pressure gauge
magnetic water cleaning device
marine resources chemistry
mason-dixon lines
meyerhold
nephroprotective
nonequilibrium characteristics
operation revenue
optical fiber communication repeaters
Ormslev
oval grid
oxygenoid constitution
pentium 2
phosphoinoside
pipe-rolls
platform cover plate
platy-structure
porcelain plugger
potassium space
power-driven scram
programming primitive
ringing converting equipment
Sandgerdhi
Saquarema
scandalise
self-levelling level
software error study
solid state radio altimeter
spliced
stuck around
stud tube water wall
surface effect aircraft
sylvanites
taillage
thermoplastic vinyl tile
thiads of Scbultz
three-dimensional profiling machine
time-point
tirantis
trade debtor
trainee teachers
Traumatociclina
wighy
winter daffodil
wireframers
zone of capillarity