液态地球内部

Scientists know that the combination of extreme heat and pressure changes carbon into diamonds. Such heat and pressure exist only in the hot, liquid mass of molten rock deep inside the earth. It is th

发表于:2018-12-01 / 阅读(201) / 评论(0) 分类 自考英语(一)78讲

(man) I'm glad you brought up the question of our investigations into the makeup of the Earth's interior. In fact --- since this is the topic of your reading assignment for next time --- let me spend these last few minutes of class talking about it.

发表于:2018-12-05 / 阅读(210) / 评论(0) 分类 托福听力短文

Diamonds 钻石 Diamonds are rare, beautiful, and also quite useful. They are the hardest substance found in nature. That means a diamond can cut any other surface. And only another diamond can make a

发表于:2018-12-05 / 阅读(148) / 评论(0) 分类 有声英文阅读

Diamonds Diamonds are rare, beautiful, and also quite useful. They are the hardest substance found in nature. That means a diamond can cut any other surface. And only another diamond can make a slight cut in a diamond. Diamonds are made from carbon.

发表于:2018-12-07 / 阅读(141) / 评论(0) 分类 双语有声阅读

SCIENCE IN THE NEWS - All About Fireflies and Possible Liquid Water on Mars CHRISTOPHER CRUISE: This is SCIENCE IN THE NEWS, in VOA Special English. Im Christopher Cruise. BOB DOUGHTY: And Im Bob Doughty. Today, we tell about evidence of liquid water

发表于:2018-12-07 / 阅读(173) / 评论(0) 分类 2011年VOA慢速英语(八)月

NASA's Juno Spacecraft Shows the Makeup of Jupiter Scientists are finding that the inside of Jupiter is just as interesting as the part of the planets atmosphere that we can see. At the center of the planet is a liquid mixture of the elements hydroge

发表于:2018-12-08 / 阅读(133) / 评论(0) 分类 2018年VOA慢速英语(四)月

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

NASA's Juno Spacecraft Shows the Makeup of Jupiter Scientists are finding that the inside of Jupiter is just as interesting as the part of the planets atmosphere that we can see. At the center of the planet is a liquid mixture of the elements hydroge

发表于:2019-01-03 / 阅读(130) / 评论(0) 分类 2018年VOA慢速英语(四)月

Australian Scientists Propose a Telescope to Look Deep Underground Scientists in Australia want to build what they describe as a downward looking telescope to look for mineral wealth under the Earths surface. The telescope is really a project aimed a

发表于:2019-01-03 / 阅读(175) / 评论(0) 分类 2018年VOA慢速英语(十)月

[00:13.09]Reading, speaking and writing [00:16.54]I HAVE SEEN AMAZING THINGS [00:20.48]My first visit was to a space station [00:24.45]considered the most modern in this part of space. [00:28.21]Described as an enormous round plate, [00:31.92]it spin

发表于:2019-01-10 / 阅读(329) / 评论(0) 分类 高中英语人教版必修

Mantle 地幔 We are living on the surface of the Earth. 我们生活在地球表面。 So, what is inside the Earth? 那么,地球内部是什么? There is a mantle under the surface of the Earth. 地球表面以下是地幔。 The mantle takes

发表于:2019-01-10 / 阅读(249) / 评论(0) 分类 与美国小学生一起学英文第7册

Is there life beyond Earth in our solar system? 在地球以外,太阳系里还有生命吗? Wow, what a powerful question. 哇,多么掷地有声的问题! You know, as a scientist -- planetary scientist -- we really didn't take that very se

发表于:2019-01-18 / 阅读(144) / 评论(0) 分类 TED演讲科学篇

A new galaxy is formed where, instead of the discs that the original galaxies have, where all the stars are going around more or less on a plane. Instead the stars are going every which way just like the elliptical galaxies that we see. And so we are

发表于:2019-01-22 / 阅读(156) / 评论(0) 分类 自然百科2011年

Easily confused by this idea, there has a big thawed iron inner core, so that I think it's just the bar magnet, just permanent magnet frozen in nad, and that's where causes all the magnetic field. But it's too hot inside the Earth, that can't happen

发表于:2019-01-22 / 阅读(160) / 评论(0) 分类 自然百科2011年

The by-product of billions of years of production from the chemical smog factory in the upper atmosphere, the grains in Titan's dunes may literally fall from the sky. Like a rain of flash-frozen coffee grounds, they are swept by the wind into deep pi

发表于:2019-01-22 / 阅读(123) / 评论(0) 分类 自然百科2012年

HARI SREENIVASAN: Time now for our weekly segment on science called the Leading Edge, and the discovery of another possible Earth-like planet that's grabbing worldwide attention today. It is true, scientists have previously said they believe there ar

发表于:2019-01-27 / 阅读(121) / 评论(0) 分类 PBS访谈环境系列

We might not be alone in the universe. Actually, it may be confirmed as a very crowded place by new computer models developed to help identify habitable planets. Estimates of places that can sustain life have been based on the likelihood of them havi

发表于:2019-02-13 / 阅读(118) / 评论(0) 分类 英语听力精选进阶版

THE PART OF THE planet earth that the seas occupy has been assessed at 3,832,558 square myriameters, hence more than 38,000,000,000 hectares. This liquid mass totals 2,250,000,000 cubic miles and could form a sphere with a diameter of sixty leagues,

发表于:2019-02-25 / 阅读(209) / 评论(0) 分类 《海底两万里》中英双语有声读物

Apart from much else, our lively interior created the outgassing that helped to build an atmosphere 不说别的,我们活跃的内部使大量气体喷涌而出,帮助建立了大气层, and provided us with the magnetic field that shields us

发表于:2019-02-25 / 阅读(120) / 评论(0) 分类 万物简史

Magnetic North Pole Moving Faster Than Scientists Expected Earths north magnetic pole is moving, researchers say. It has moved so much, so quickly that a group of scientists hurried to change a model that helps guide shipping, airplanes and submarine

发表于:2019-03-12 / 阅读(354) / 评论(0) 分类 2019年VOA慢速英语(二)月
学英语单词
acontia
adventure-based
agrizoophobia
air defense suppression missile (adsm)
Albalate del Arzobispo
alkaline fusion
allotriomorphs
american cargo war risk reinsure exchange
asymptotic expansion of moments
attachment of shackle
autonmous tariff
az-
banana-shapeds
beginning temperature
broadbrushes
coptank
defensiveness
degree centigrade
degree of penetration
demolishable
diminutive
disk gauge
draining device
electromoxibustion-apparatus
elnadipine
energy cycle
ethylmethiambutene
fighter-interceptor
forged steel pipe union
full right
Habenaria delavayi
Hellsö
hunker down
hypercedemonia
impossible actions
in one voice
indoor switching station
inducedmotion
inventory accounting
inventory ahortage and apoilage
Katagum, R.
l-Amphetamine
lexicalising
limewhiting
Linton
loss carryforward rules
Lālpāni
manularity
mediant triad
metallic salts poisoning
mexicano
minimax principle
monitoring cord
mos.
MQA
mutual restraint between drugs
navyless
nde
New Zealand white mouse
nijazi
nipple drinker
noise stability
nonchipping
nonpsychoanalytic
object tracking
one-way trunk
Ophiceras
outer filter
parabolic transition curve
per quod
PRIF
program comparison
PRS (Prototype Retrieval System)
psectrocladius formosae
pseudoisochromatic
psychon
quinol phosphate
rainjackets
real-time application programming
receiver noise threshold
retardation controller
saccharinates
salle-dattente
sickle medicks
single-model assembly line
solid axis
space reddenings
specialthe
spontaneous fermentation
spud lead
stacker selection
strata nucleare medullare oblongatae
substitution instance of the statement function
tall problem
total suspended partieulate index
trimetallic plate
triple comparisons
two-cycle principle
ultrasonic field
unbonneting
vacation village
wheretoward