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

 Like nebulae which spawn² stars, it is made of gas and dust. But that's where most similarities end. For Alex Filippenko, it represents an intriguing³ industrial zone within our galaxy⁴ where the elements from which our world is made or manufactured. 

 

 

 

What about more iron. Oh,

 

The Crab⁵ Nebula¹ is a fascinating object. We see/ very rapidly expanding gases. The Crab may appear static, but its gases are racing⁶ out from its center at over 3 million miles an hour, blasted out by a phenomenally powerful event in the past. 

 

 

 

What could cause such violence?

 

When we examine the gases of the Crab Nebula which are expanding outward, and we extrapolate that expansion backward in time, we find that all the gases were at a common point about 1000 years ago. 

 

 

 

A thousand years ago on earth, there were civilizations watching the heavens. In 1054 AD, Chinese manuscripts tell of the sudden arrival of a brilliant new star which are brighter than any other star. So brightly, it was visible during the day. Then it mysteriously disappeared. 

 

 

 

Today the Crab Nebula appears in exactly the same part of the sky where the Chinese observed their brilliant star. What they witnessed was the moment the Crab was born. The Crab Nebula was produced by the colossal⁷ titanic⁸ explosion of the star at the end of its life. It is a supernova remnant.

 

 

 

The spiral arms of our Milky⁹ Way elated with these colorful remnants, tombstones of stars that died violently in cataclysmic explosions astronomers¹⁰ call supernovae.

1 nebula   

n.星云，喷雾剂

参考例句：

• A powerful telescope can resolve a nebula into stars.一架高性能的望远镜能从星云中分辨出星球来。
• A nebula is really a discrete mass of innumerous stars.一团星云实际上是无数星体不连续的集合体。

2 spawn   

n.卵，产物，后代，结果；vt.产卵，种菌丝于，产生，造成；vi.产卵，大量生产

参考例句：

• The fish were madly pushing their way upstream to spawn.鱼群为产卵而疯狂地向上游挤进。
• These fish will lay spawn in about one month from now.这些鱼大约一个月内会产卵。

3 intriguing   

adj.有趣的；迷人的v.搞阴谋诡计(intrigue的现在分词)；激起…的好奇心

参考例句：

• These discoveries raise intriguing questions. 这些发现带来了非常有趣的问题。
• It all sounds very intriguing. 这些听起来都很有趣。 来自《简明英汉词典》

4 galaxy   

n.星系；银河系；一群(杰出或著名的人物)

参考例句：

• The earth is one of the planets in the Galaxy.地球是银河系中的星球之一。
• The company has a galaxy of talent.该公司拥有一批优秀的人才。

5 crab   

n.螃蟹，偏航，脾气乖戾的人，酸苹果；vi.捕蟹，偏航，发牢骚；vt.使偏航，发脾气

参考例句：

• I can't remember when I last had crab.我不记得上次吃蟹是什么时候了。
• The skin on my face felt as hard as a crab's back.我脸上的皮仿佛僵硬了，就象螃蟹的壳似的。

6 racing   

n.竞赛，赛马；adj.竞赛用的，赛马用的

参考例句：

• I was watching the racing on television last night.昨晚我在电视上看赛马。
• The two racing drivers fenced for a chance to gain the lead.两个赛车手伺机竞相领先。

7 colossal   

adj.异常的，庞大的

参考例句：

• There has been a colossal waste of public money.一直存在巨大的公款浪费。
• Some of the tall buildings in that city are colossal.那座城市里的一些高层建筑很庞大。

8 titanic   

adj.巨人的，庞大的，强大的

参考例句：

• We have been making titanic effort to achieve our purpose.我们一直在作极大的努力，以达到我们的目的。
• The island was created by titanic powers and they are still at work today.台湾岛是由一个至今仍然在运作的巨大力量塑造出来的。

9 milky   

adj.牛奶的，多奶的；乳白色的

参考例句：

• Alexander always has milky coffee at lunchtime.亚历山大总是在午餐时喝掺奶的咖啡。
• I like a hot milky drink at bedtime.我喜欢睡前喝杯热奶饮料。

10 astronomers   

n.天文学者，天文学家( astronomer的名词复数 )

参考例句：

• Astronomers can accurately foretell the date,time,and length of future eclipses. 天文学家能精确地预告未来日食月食的日期、时刻和时长。 来自《简明英汉词典》
• Astronomers used to ask why only Saturn has rings. 天文学家们过去一直感到奇怪，为什么只有土星有光环。 来自《简明英汉词典》