地球的力量 第5集稀有行星(10):火山噴發(fā)

Magma heated by the core rises towards the Earth'ssurface.

炙熱的巖石受到地核加熱提升到地球表面

As it spreads sideways,the Earth's crust is very slowlydragged apart.

隨著向兩邊蔓延 地殼漸漸地被分離開

This moves the continents,creating the Earth's restless and ever-changing surface.

導致了板塊運動 導致地球表面無休止的變化

But crucially for life,the core does more than just shape the planet.

但是這對于生命很關鍵 地核不僅僅是塑造了地球表面

Where these plates collide, it creates massive volcanic eruptions,

板塊運動它造成了巨大的火山噴發(fā)

which release carbon dioxide into the atmosphere.

向大氣層釋放二氧化碳

Today, we think of carbon dioxide

如今，我們覺得二氧化碳

as a dangerous greenhouse gas that leads to global warming.

是導致全球變暖的危險的溫室氣體

But throughout Earth's long history, carbon dioxide has played a vital role

但是在地球漫長的歷史長河中二氧化碳發(fā)揮著重要作用

in keeping our planet the right temperature for complex life to survive.

來維持我們的星球溫度適宜 適合復雜生命存活