纪录片《地球的力量》第一集 火山04:生命起源的条件

Just take a look at the motion of the lava lakes speed up,

看看熔岩湖岩浆快速的翻滚吧

it wells up from one side of the crater and forms a dark crust as it cools.

它在火山口的一边涌出来 冷却后形成暗色的硬壳

Then this crust moves across the surface of the lake driven by the churning action of the lava below.

岩浆不断的涌动使硬壳在熔岩湖表面移动

Finally, the crust sinks back down.

最后这个硬壳块又沉下去了

this process of molten rock churning away below the surface effects our entire planet on a blobal scale.

我们会发现地表以下的熔岩不断的涌动 这个过程影响了地貌

But the Earth's heat does far more than simply fuel volcanoes.

地球热能的作用远远不止为火山提供能源

It continually rebuilds the planet's surface

它持续不断的改造着地球地貌

And it created the conditions for life on Earth to begin.

并仓创造了地球上生命起源的条件

To understand where our planet's immense inner heat comes from,

要弄明白地球内部的热能是从哪里来的

we have to go back four and a half billion years.

我们必须从45亿年前

This is the time of our planet's birth.

地球产生开始说起

重点讲解

1、speed up

a、加快(…的)速度

You notice that your breathing has speeded up a bit...

你注意到自己的呼吸加快了一些。

He pushed a lever that speeded up the car.

他挂挡加快了速度。

b、(使)(某一过程或活动)加快

Job losses are speeding up.

失业趋势正在不断加快。

I had already taken steps to speed up a solution to the problem...

我已经采取措施加快解决该问题。

2、below

a、介词（位置）在…下面，低于

He appeared from the apartment directly below Leonard's...他从伦纳德家正下方的公寓里走了出来。

b、在地下；在地表以下

They have designed a system which pumps up water from 70m below ground...

他们设计了一套从地下70米处抽水的系统。

c、以下；在下文中

Please write to me at the address below...

请按照下面的地址给我写信。

d、（数量、比率或水平）低于，小于，少于

Night temperatures can drop below 15 degrees Celsius.

夜间气温会降到15摄氏度以下。