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
-clinic
aedpa
allowable cutting unit
any-body
apsidal transformation
at tubayq
Autol
Bohr quantization condition
bridge parts
broadcast speech
byerne
C. & D. C. C.
central pulverized coal system
centrifugal precipitation tube
characterless
chloroplastonema
Cleopatra
clodoxopone
compound dyke
Dagestanskiy Ogni
decubitus
deforciants
Deiters' terminal frame
democratic operation of the communes
directed ray
disinhumed
dog-grass
dogshores
dynamic-semantics
endowel
entail great expense on sb
feeding current
female ass
fetal scarless wound healing
fired tube
flaser gneiss
flunkee
flying camp
function symbol
gas replacement
gate clear relay
geometry of position
glucose-2-oxidase
gynecological mass in abdomen
has comeis up
heat transfer device
hemiballismus
hold a celebration
in crowds
in-ceiling- type air conditioner
incomplete observation
inward chance variation
junction points
keymaps
kinetospore
lenin
loaf form
Louisiana virus
mage
matildite
middle peasant
minimum vertex cover problem
necromantically
Newtonian theory
nmiu
non-acidfast
nondeductivity of theory from observation
nonrestrictivist
omnipresential
optical radiation effects
parasitic jaeger
Pedicularis petitmenginii
persistent organic pollutants,POPs
pollinctors
Primula beesiana
product group forecast
pulled it off
QR code
rapid departure
record and process input table
reliability prediction model
remba
revcur (reverse current)
rimsulfuron
Sacambunge
serphid
sextains
ship model test towing tank
shuttle-ploughing
spina spinae
stainless steel paper holder
Stand-quality
super-reaction
swing-over
temperature buffer
tinted paint
unbounced
verlag
weved
window closing
xylene cyanol ff
zeyreks