Disaster movies often portray catastrophes that destroy, or at least threaten to destroy earth's entire population.

灾难影片经常刻画那些毁灭，或者至少威胁着要毁掉地球上全部人类的大灾难。

That's because the earth's atmosphere shields us from harmful radiation.

这是因为地球的大气层保护我们免受辐射伤害。

One degree of latitude on the earth's surface equals almost 70 miles.

地表上的纬度一度相将近七十英里。

Fast enough to escape earth's gravity and begin the shuttle era.

使其能以足够快的速度逃离地球引力，从航天飞机时代。

The journey of these emissions begins deep underground in the earth's core.

这些排放物来自于地核深处。

If one of these rocks hit's the earth's atmosphere, it becomes a meteor.

如果其中一个流星体撞上了地球的大气层，变成流星。

These ocean waves are among the earth's most complicated natural phenomena.

这些海浪属于地球上最复杂的自然现象。

What is a rejection in love judged against the earth's 4. 5 billion year history?

和地球45亿年的历史相比，爱情受挫算什么？

Long before dolphins swam the seas, their near look-alike ichthyosaurs inhabited the earth's oceans.

远远早于海豚在海中畅游之前，外形与其极为相似的鱼龙已经栖息在地球的海洋中了。

Or, 'twenty miles below the earth's surface', definitely not immediately under it.

再有“地表20英里以下”，指的绝对不是指紧挨着地表的地方。

The Nile is the earth's resource, it belongs to the earth.

尼罗河是地球的资源，是属于地球的。

The earth's poles are called the North Pole and the South Pole.

地球的极点称作北极和南极。

It describes how different colours of sunlight interact with the earth's atmosphere.

描述了不同颜色的太阳光是怎样与地球大气层互相影响的。

The other main factor at play is what's happening above the earth's surface.

另一个起作用的主要因素是地球表面发生的情况。

And here is what happen if earth's crust suddenly opened up?

我们来看看，如果地壳突然打发生什么事情。

Scientists tell us that because of air pollution, the earth's heat cannot escape.

科学家告诉我们由于空气污染，地球的热气无法散出去。

A bit bigger I will be than the earth's moon that you see.

我比地球的月亮更大一点。

They contain a record of earth's climate that's pretty much unrivaled by other archives.

们包含着地球气候的记录，几乎是其他档案无法比拟的。

In Kawah Ijen, we can see first-hand how the earth's machine produces these valuable chemicals.

在卡瓦伊真火山，我们可以亲眼见识到地球机器是如何生产出这些宝贵化学品的。

Three-fourths of the earth's surface is covered by water.

地球表面的四分之三被水覆盖。