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英语听力：自然百科 穿越银河系的旅行 Through Milky Way—9

Like nebulae which spawn stars, it is made of gas and dust. But that's where most similarities end. For Alex Filippenko, it represents an intriguing industrial zone within our galaxy where the elements from which our world is made or manufactured. Wh

发表于:2019-01-22 / 阅读(61) / 评论(0) 分类 自然百科2011年

英语听力：自然百科 穿越银河系的旅行 Through Milky Way—5

We are taking a ride through the Milky Way. First, we are traveling to a place where stars are born. Even at the speed of light, 196,000 miles a second, the journey lasts for 1,500 years. We've arrived at the vast glowing cloud of gas and dust, the g

发表于:2019-01-22 / 阅读(68) / 评论(0) 分类 自然百科2011年

英语听力：自然百科 穿越银河系的旅行 Through Milky Way—6

Look closer and there is something strange about this gas and dust. There're patches where it appears to glow. These bright glowing clouds are called nebulae. And along with the Orion Nebula, our Milky Way has some spectacular examples, the Eagle Neb

发表于:2019-01-22 / 阅读(72) / 评论(0) 分类 自然百科2011年

英语听力：自然百科 穿越银河系的旅行 Through Milky Way—8

Like nebulae which spawn stars, it is made of gas and dust. But that's where most similarities end. For Alex Filippenko, it represents an intriguing industrial zone within our galaxy where the elements from which our world is made or manufactured. Wh

发表于:2019-01-22 / 阅读(83) / 评论(0) 分类 自然百科2011年

英语听力：自然百科 穿越银河系的旅行 Through Milky Way—13

In about four or five billion years, it will grow into a much bigger star, a star called a red giant. And that outer atmosphere of gases will be held so loosely by the sun at that time that the gases will be blown away gently in what I call a cosmic

发表于:2019-01-22 / 阅读(71) / 评论(0) 分类 自然百科2011年

英语听力：探索发现 2014-05-23 BBC 地平线：陨石的真相-6

Meteor strikes as big as this may be rare butscientists have a surprisingly detailed knowledge of what meteorites are andwhere they come from. Long before the meteorite reached its explosivefinale in full view of Chelyabinsks dash cams, it had a very

发表于:2019-01-23 / 阅读(63) / 评论(0) 分类 探索与发现2014年

2015-05-20 BBC:星光七纪元-35

Could these be the neutron stars predicted by Z? astronomers nicknamed them pulsars and immediately set their telescopes searching for further clues about them, just a year later, they found one, in the perfect place to put Z's theory to the test.In

发表于:2019-01-23 / 阅读(82) / 评论(0) 分类 探索与发现2015年

外贸口语一点通第174期:参加展会之产品介绍

Commodity introduction 产品介绍 A: This is my first visit to the Fair. Everything is new to me, so many people and so many showrooms. Mr. Ding, would you please give me some information? 我第一次参加广交会，觉得一切都很新鲜，这么

发表于:2019-01-23 / 阅读(119) / 评论(0) 分类 外贸英语一点通
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