地球的力量 第5集 稀有行星(2):智慧生物

Ever since we humans have been able to scan theheavens,

自從我們人類可以靠近天穹

we've been looking for signs of intelligent life likeus,up there in space.

我們就一直在太空里尋找 像自己一樣的智慧生物

This array of radio telescopes in America has beenpart of that search.

這些位于美國的無線電望遠鏡 就是這種探索的一部分

These telescopes can see deep into space.

這些望遠鏡可以看到太空深處

But, so far, we haven't found anything.

但是目前為止我們什么都沒有發(fā)現(xiàn)

Now it could be that we've not been looking for long enough

現(xiàn)在也許我們尋找的還不夠久

or in the right part of space,but there is another possibility.

也許找錯了地方 但是還有一種可能

Perhaps we haven't found any signs of life because there's simply nothing out there.

那就是我們沒有找到其它生物的原因是 它們根本就不存在

It's hard to believe that we might be on our own.

相信我們是唯一的生物很難

After all, there are billions of stars in our own galaxy,the Milky Way.

畢竟我們自己的銀河系就有幾十億星球 我們的銀河系

And the Milky Way is just one of billions of galaxies.

而宇宙中有幾十億個銀河系

You'd think there must be other Earths out there, just like ours.

你會覺得也許太空里有其它的地球就像我們的一樣

Capable of supporting life just like us.

能夠支撐我們這樣的生命