Earth&Sky: 形成行星所需的水分子从哪里来？

英语自学网

20090916958572344017.jpg

听写填空,只写填空内容,不抄全文,5-10句,不用写标号,注意标点,口语中因结巴等问题造成的重复单词只写一遍~
Hints:
molecules
methanol

Ted Bergin: [---1---]  
You're listening to astronomer Ted Bergin of the University of Michigan. [---2---]  
Ted Bergin: [---3---]  
[---4-5---]  
Ted Bergin: [---6-7---]
[---8---]
Ted Bergin:  [---9-10---]
Our thanks today to: astronomer Ted Bergin
I’m Jorge Salazar for ES, a clear voice for science. We’re at Es. Org.
【视听版科学小组荣誉出品】

btn_listen1974117.gif

The giant-like clouds are light-years in size. So they’re so large they sort of boggle the mind.
He’s talking about huge clouds of molecules in space that collapse to form thousands of stars and planets.
So we know that we’re seeing CO, and we know we’re seeing methanol, we’re detecting alcohol in space, and most importantly, water.
As a gas cloud in space collapses under its own weight, Bergin said that hydrogen and oxygen molecules combine and freeze as water ice on grains of dust.
He added that a lot of water, enough water to fill oceans, collects as ice in planet-forming discs that surround young stars.
So the disc itself, and the cloud, will have thousands, perhaps tens of thousands of oceans of water.
And a fraction of that gets incorporated into Earth-like planets.
Bergin also said that the building blocks of life what scientists called pre-biotic molecules, ride along with the ice in clouds during planet formation.
Now maybe they don’t have anything to do with the initial steps of life.
But maybe they aided and sort of jump-started the initial steps transitioning from chemistry to biology.