英语听力：自然百科 穿越银河系的旅行 Through Milky Way—35

 You know, the indications there  are a lot of those stars have planets, maybe have them built since planets you know, being like kittens, you know, just dig one, you get a couple. They are probably on the order of the million and million planets out there.

A trillion planets and an unimaginable large number but what is the chances of any of them being  in a location where life could flourish.

We can expand the idea of a habitable zone around the star to a habitable zone within our entire Milky¹ Way galaxy². On our journey around the Milky Way, we would learn to a great deal to help in the search for a galactic zone, a safe heaven for life. 

In close at the harbour, there is extraordinary many of X-rays, harsh radio waves even gama rays, that would certainly destroy fragile single cell life, just getting start toward evolution.

Downtown this dangerous, there is super massive life hold on their //that also has bad things to happen. There are also a lot of stars around there . You know, There are a lot of stars sound good. But on the other hand, if you have too many nearby stars, they can be // all the commit in the solar system. They constantly commutating with these pollutions that just as the Venus source, are not only good for you. 

Safe neighbourhood maybe found in the spiral larms, but here too is all about location. If you have been on the planets in a super nova that explosion can boo you whole again, like my get started and then you know, another couple of hundred million years later get white down, so this area of resource with no goals on, on mans land,well, no alliance on perhaps,

The outer reaches of our Milky Way a quieter, but even here life would find it difficult to evolve.

At the out girds of our Milky Way galaxy are there very many elements of which the cells of our bodies n life we know are composed and so we may not have the essential building blocks of  life at the outer edges of our Milky Way. 

So it's no accident that we are where we are, our neighbourhood talk too way to spiral larms is the perfect habitable zone because it remain relatively³ unchanged for billions  of years, giving life, time to establish and evolve, other advanced civilizations if they exist unlikely to living in a similar neighbourhood. Kokoon for the dangerous of the galaxy. We have yet to find them of course but the galaxies⁴ is a big place. 

We haven't found any life elsewhere. We haven;t found any dead pounds anywhere, not convincingly. And why is that, well, fewer in thousand stars get carefully for a planets that have intelligent life. You know it's her way to going to Africa. They are looking for a Mega Forna you know, element. And you learnt  Africa and you look the first square yard of a real state and there is no elephants here and you give up, well,you shouldn't give up. We are just beginning.

1 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。

2 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。

3 relatively   

adv.比较...地，相对地

参考例句：

• The rabbit is a relatively recent introduction in Australia.兔子是相对较新引入澳大利亚的物种。
• The operation was relatively painless.手术相对来说不痛。

4 galaxies   

星系( galaxy的名词复数 )； 银河系； 一群（杰出或著名的人物）

参考例句：

• Quasars are the highly energetic cores of distant galaxies. 类星体是遥远星系的极为活跃的核心体。
• We still don't know how many galaxies there are in the universe. 我们还不知道宇宙中有多少个星系。