地球的力量 第4集 海洋(8)改變著氣候

Today, only the hardest outcrops are left behind.

今天只剩下了最堅(jiān)硬的巖層

They're called sea stacks.

這就是所謂的海蝕柱

But even they will eventually be ground away.

但是它們也將慢慢地被磨掉

The oceans influence our planet

海洋對(duì)我們星球的影響

in many far more subtle and profound ways.

更多的是以微妙深?yuàn)W的方式進(jìn)行

They drive the climate.

它們改變著氣候

They harbour creatures that deliver oxygen to our atmosphere.

將氧氣輸送到大氣層

And below the oceans surface is an extraordinary network of currents

在海洋表面以下是一片獨(dú)一無(wú)二的洋流體系

that are critical to the wellbeing of all life on Earth.

這對(duì)地球上所有的生命良性發(fā)展起到關(guān)鍵作用

But four and a half billion years ago, when our planet was born,

但是450億年前，地球剛剛誕生

it was just a molten inferno.

它不過(guò)是一個(gè)融化的地獄

There was no place for any liquid water at all.

根本沒(méi)有液體存在的可能

Yet the ingredients needed to create water were there,

但是倉(cāng)創(chuàng)造水的成分都存在

locked away deep inside the Earth when the planet formed.

在地球形成的時(shí)候被緊緊壓在了地球里面

As the first volcanoes erupted,

第一次火山爆發(fā)的時(shí)候

one of the gases that billowed out was steam.

第一股爆發(fā)出來(lái)的氣流中就有蒸汽

And as the planet cooled, it formed clouds.

等到星球冷卻下來(lái)就形成了云