英语听力:自然百科

She chews its tail first, to make sure the fish can't get away. While the pups are still demanding milk, the mother otter will often keep the whole fish for herself. Her pups are happy enough with caviar. As the flow becomes slow enough for the trout

发表于:2019-01-22 / 阅读(55) / 评论(0) 分类 自然百科2012年

This female grew up on the lake, so she knows where to take the cubs for a very special trip. Yellowstone cutthroat trout are massing in the mouth of the stream that feeds the lake. They are preparing for their annual spawning. But the trout must wai

发表于:2019-01-22 / 阅读(62) / 评论(0) 分类 自然百科2012年

For six months, Yellowstone endures an unrelenting winter. An ice world of hunters and hunted. But now footsteps on the slopes of a mountain herald a change in the season. The sun regains its strength.Water flows again. The race begins to recover win

发表于:2019-01-22 / 阅读(66) / 评论(0) 分类 自然百科2012年

The Prime Meridian(本初子午线) here is the longitude, the mark on the ground, from which all great voyages are measured. This is the view back to our remarkable home planet/ that the first human out here can look forward to, a distant blue dot l

发表于:2019-01-22 / 阅读(72) / 评论(0) 分类 自然百科2012年

Breathing from a so-dubbed scuba unit and now fitted in a cross between a super ski suit and a haz-mat coverall, future Titannauts could explore with confidence. You just need that thermal protection and oxygen, and then you can play on the surface a

发表于:2019-01-22 / 阅读(59) / 评论(0) 分类 自然百科2012年

The living is easy. But it won't last long. At this altitude, the air is so dry that rain evaporates before it even hits the ground. The water that flows off the plateau is no longer being replaced. Already there is drought in forests beyond the mead

发表于:2019-01-22 / 阅读(76) / 评论(0) 分类 自然百科2012年

With Saturn's 62 known moons, Cassini finds itself in good company without of this world photo opportunity to make even a seething professional gasp. Saturn is the most photogenic planet in all the solar system, so I just, you know, I mean, you could

发表于:2019-01-22 / 阅读(55) / 评论(0) 分类 自然百科2012年

Imagine boarding a flight to Saturn, what would you need to know before traveling? The best ringside vantage points? The must-see moons? Think of this as your personal guide to the splendor of the Saturnian system. A wandering spot of light twice as

发表于:2019-01-22 / 阅读(65) / 评论(0) 分类 自然百科2012年

Saturn might be the second largest planet in the solar system, but like gas giant neighbor Jupiter, its a triumph of show over substance. Saturn, first of all is a big giant gas ball, actually its a big giant ball of fluid, and the outer parts of it

发表于:2019-01-22 / 阅读(59) / 评论(0) 分类 自然百科2012年

Hopes and dreams of thousands of scientists and engineers are resting on the next few moments. Weve been to Saturn twice before with the voyager I and voyager II spacecraft. But rather than these quick Kodak moments, we want to take a nice long leisu

发表于:2019-01-22 / 阅读(70) / 评论(0) 分类 自然百科2012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(56) / 评论(0) 分类 自然百科2012年

Huygens landed on Titan. It/ sent back these few hundred pictures, until the batteries died and the probe froze solid. The probe landed with a thud, on basically a streambed,an area/ littered with rounded cobbles, and showed that these little rocks

发表于:2019-01-22 / 阅读(52) / 评论(0) 分类 自然百科2012年

Planet earth never attempted to land on such a distant world before. With Huygens probe on final approach to Titan, operations switch to European mission control. The probe hurtled into Titans atmosphere at 6km a second, the atmosphere would have bee

发表于:2019-01-22 / 阅读(108) / 评论(0) 分类 自然百科2012年

Cassini has solved the mystery of how at least one of Saturn rails' formed, and this may help solve the bigger mystery of life beyond Earth, * may be the hottest ticket in town, but don't overlook the heavy weight container for the titan lovemoon wit

发表于:2019-01-22 / 阅读(66) / 评论(0) 分类 自然百科2012年

Heres the surprise entry into search for life, this little moon that youd expect to be pretty dead and dull, and coming out of the South Pole of it is a jet of water ice, all the things you need for life are there. Theres an energy source, theres a w

发表于:2019-01-22 / 阅读(51) / 评论(0) 分类 自然百科2012年

It was unraveling a puzzle and so the magnetometer team says lets go closer, as we go closer, we watched as the star went through and noticed the change in brightness, something is going on. We can see even from a distance, there seem to be this mate

发表于:2019-01-22 / 阅读(52) / 评论(0) 分类 自然百科2012年

We are interested in studying seasonal changes on Saturn, because of its extremes affected the rains. Already we know the sky was blue, when the northen hemisphere came out of the shadow and it's now turn sort of pinkish yellowish, hazy color, becaus

发表于:2019-01-22 / 阅读(70) / 评论(0) 分类 自然百科2012年

Saturns apparently peaceful appearance is due to a haze of high level ammonia in the upper atmosphere, by looking deep into Saturn in the infrared, using the planets own internal heat as a light source, Cassini has revealed the planets true nature. T

发表于:2019-01-22 / 阅读(54) / 评论(0) 分类 自然百科2012年

And the icy grains on the Saturnian beaches are washed by passing traffic. When a moon comes by, it creates a wake just like a motor boat creates a wake that goes behind it. And I kind of imagine the ring particles doing an intricate cosmic dance aro

发表于:2019-01-22 / 阅读(56) / 评论(0) 分类 自然百科2012年

Everyone is familiar with the rings of Saturn. But what would you highlight if it were you sending back the postcards? Every tour itinerary has one main attraction. With Saturn, you just can't miss the rings. As imaging team leader for Cassini, Carol

发表于:2019-01-22 / 阅读(54) / 评论(0) 分类 自然百科2012年
学英语单词
'bot
a broken home
acyloxylation
al haniyah
alleluiah
aluminio-
Andumine
astronomical phenomenon
audio-follow-video
auricularia peltata
autotoxic
basaloid cell
basket strainer
Bolligen
boosters
borsuk
boutaris
bromchlorenone
Camptosaurus
central conceptual structure
colloid-osmotic pressure
computer laser technology
deed of priority
dendrochronology
discharge through gas
doubteth
enclosed fitting
EXOS
ferruginous hawk
fire-fighting fleet
floating instrument platform
Flyte
foreign bank
Fort Usher
Fowles
Gardelegn
get one's comeuppance
go though
gray cyclic code
gregarinulae
heat-releasing fluid
homographic solution
house voucher system
Huanzo, Cord.de
hydrocodes
hypereutectoid cast iron
idioecology
impression material
instrumentalises
junk market
logic-sum gate
loins of lamb
man-of-law
maritime buoyage
martha's
measuring sparkgap
mid-februaries
modulated quantity
Myrocongridae
Nagge
navigation analysis
Nerdic
Nigerian capital
nougat
official number certificate
order amoebinas
Orthodox Churches
otho
papillate hair
partial short-circuit
pay through
perhydrocrocetin
preciation
press-powder
protective capacitor
ranked payoff
rankinite
remote maintenance philosophy
repair according to condition
Sandston
Schizaeaceae
Second Vatican Council
serial type of task
shadow-Moire test
sindesvel
smoke limit
snowmakings
spreadeagled
stand in good stead
static processor allocation
stretch the envelope
tidswell
torslograph
Trichotrachelidae
type classification
unforfeit
updraft
vapor corrosion inhibiter
vatten
vha
web application
yanka