标签：ESL旅行 相关文章
021A 远足旅行: 初级课程 Daphne是个远足迷。她和朋友Roger一起去山里露营。不过，不是所有人都喜欢户外活动。 Professor: That's right, Winnie. Some people like hiking, but some like to stay indoors. Daphne: Wow, wh
美语三级跳
Measuring the brightnesses and colors of the stars in the globular cluster, we can figure out how old they are. Here is the remarkable thing: they are very old. Globular clusters, at least the stars in the globular clusters, in many cases, are almost
自然百科2011年
By comparing the detailed images, Hubble has taken another spiral galaxy. With the best images of our own taken from the ground, and by using satellites to measure the distance and density of stars in different directions, astronomers have been able
自然百科2011年
This is a picture of the Orion Nebula in visible light. We can see all of the gas here located in front of what we know are stars in the background, and we want to be able to look inside this nebula/ and see the stars. In infrared light in this image
自然百科2011年
These are just bold first steps on a journey that's just begun. Even before the mission is over, Cassini has left a thirst for a return trip. Planetary explorer Jonathan Lunan and aeronautical pioneer Julia Nod think they know the perfect way to do i
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
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
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
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
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
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
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
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
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
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
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
自然百科2012年
No planet beats Saturn for jaw-dropping beauty. Saturn is the most photogenic planet in all the solar system. Some of the pictures are to die for. But the postcards only tell part of the story. Beauty is only skin deep. It really is rolling and seeth
自然百科2012年
China has outlined new regulations on officials' travel expenses with aims to promote less waste. According to the regulations, officials at department and bureau levels can only take economy class while travelling by air. Only officials at the minis
CCTV9英语新闻2014年01月
I am currently on a massive adventure with my family: we are seven months into a year-long trip around Australia. 我和家人正在一同展开一场声势浩大的冒险活动：全年畅游澳大利亚，这是其中的第七个月。 Coaching and
双语有声阅读
Faced with rising tuition costs and a less than satisfying job market, many would-be college students are ditching their knapsacks and textbooks for rucksacks and guidebooks. But is putting your future on hold for a year of travel the best idea? 去旅
双语有声阅读