英语听力：自然百科 从桑巴到巴萨诺瓦 Samba To Bossa—2

Samba was born along the northeastern coast around the city of Salvador/back in the days of slavery. Salvador in Bahia state was the first capital of Brazil when it was colonized by the Portuguese in the 16th century. The indigenous tribes who lived

英语听力：自然百科 从桑巴到巴萨诺瓦 Samba To Bossa—1

This is the story of a country whose music has seduced the outside world and taken on an importance that goes far beyond entertainments. You want to learn about Brazilian history without going through the books? You can just listen to the music and y

英语听力：自然百科 从桑巴到巴萨诺瓦 Samba To Bossa—15

After Luiz Gonzaga died in 1989, a statue was erected just outside Recife, the capital of his home state, Pernambuco. It marks the start of the Luiz Gonzaga Highway. Gonzaga had reminded Brazils city dwellers of the depth of music that exists out in

英语听力：自然百科 从桑巴到巴萨诺瓦 Samba To Bossa—14

Luiz Gonzaga you can compare him with Bob Marley in reggae, because he really did the melting of the style, you know. And it became very well known because he recorded it, he played it on the radio in the 40s, / 50s, so he came up with the new rhythm

英语听力：自然百科 行星旅行指南：木星 Jupiter—16

the processes that hit Io or operating on Europa as well, but on a less dramatic scale. and so was this constant change(s) in Jupiter's gravitational pull that is distorting the surface and that's generating heat in the interior. This is a clue to Eu

英语听力：自然百科 行星旅行指南：木星 Jupiter—15

When Galileo took a closer look at Europa, the picture changed. Europa is a fascinating object. If you imagine descending onto a world that looks every place like the frozen ways of the Arctic and the Antarctic, youll get a pretty good impression of

英语听力：自然百科 行星旅行指南：木星 Jupiter—14

I would like to visit Jupiter one day，I think it would be a good place to take a vacation, but not on July of 1994. That would have been a terrible time. In July, 1994, the fragmented comet Shoemaker-Levy 9 that David helped / discover began its fa

英语听力：自然百科 行星旅行指南：木星 Jupiter—13

Gas escaping into space from the plumes is energized by Jupiters magnetosphere, creating an intense band of ionizing radiation that bombards a surface already soaked in emissions. If you went out relatively unprotected with, like a normal spacesuit f

英语听力：自然百科 行星旅行指南：木星 Jupiter—12

Take a night flight, like Galileos, over the surface of Io and the view down to the churning lava lakes would be unforgettable. Imagine then a visit to the surface. The landscape might look quite a bit like a red and yellow sulfur-painted version of

英语听力：自然百科 行星旅行指南：木星 Jupiter—11

If gravity measurement showed no solid core, then Jupiter formed early like the Sun, with a core then its birth came later when solid materials were created. By measuring water content, Juno should also reveal how hot the solar system was, when Jupit

英语听力：自然百科 行星旅行指南：木星 Jupiter—10

This vast secret ocean of seething metallic hydrogen, not a molten iron core, is the power house generating Jupiters dangerous energy shroud. But there is one more mystery hidden inside this giant alien onion, the key to the origin of the planets the

英语听力：自然百科 行星旅行指南：木星 Jupiter—17

As these robot submarines accomplish great missions, the possibility of one day melting our way into Europas deep ocean is moving from fiction toward fact. Lets just imagine, there were on a little spacecraft with the capability to melt to the ice, w

英语听力：自然百科 行星旅行指南：木星 Jupiter—18

Every time we send aspacecraft to answer questions, we end up asking more. Clearly, a return to Jupiter isn't to stars. (Here we go.) In 2003, with fuel andpower running low, Galileo's 14-year odyssey was brought to an end,deliberately to ensure Euro

英语听力：自然百科 行星旅行指南：木星 Jupiter—19

One day we might develop the magnetic field technology necessary to keep a human alive within Jupiters radiation environment. But in the near future, our exploration will continue by machine. The robotic program isnt about robots. Its a profoundly hu

英语听力：自然百科 秋日黄石公园 Autumn—15

Ranchers will tolerate elk as long as they don't compete too much with their cattle. But as the elk move in, their old enemy follows them out of Yellowstone, an animal that's more difficult for ranchers to accept. In their minds, fear of the wolf run

英语听力：自然百科 秋日黄石公园 Autumn—20

As the snow returns to Yellowstone, it seems like the clock is turning back. All traces of the human world are covered up. A reminder that when the heart of this great wilderness was made a national park nearly 140 years ago, it was one of the most r

英语听力：自然百科 秋日黄石公园 Autumn—19

But now, the final act of the season is about to take place. From out of apparently nowhere come the bighorn sheep, the toughest of all Yellowstones animals. They can stay here all winter on slopes and crags that the biting wind keeps clear of snow.

英语听力：自然百科 秋日黄石公园 Autumn—18

his is a tree that needs a cold winter. Its now November and the elk have found their feeding grounds just in time, the snows of winter at their heels. Here they join other herds who come to this place every year, where the snow would be less deep an

英语听力：自然百科 秋日黄石公园 Autumn—17

And for every dam, there is a new habitat for new life, and a richer, more diverse Yellowstone. But just as Yellowstone reveals the complexity of life, it also exposes its fragility. On its lofty ridges, there are signs that all is not well with the

英语听力：自然百科 秋日黄石公园 Autumn—16

The return of the wolf will always be controversial. But evidence is now emerging that wolves are far more important than anyone imagined, especially back in the heart of Yellowstone. It's nearly the end of October. The cold autumn nights have brough