地球的力量

It gave Earth a magnetic shield against the dangerous solar wind.

它给地球一个磁场来抵抗危险的太阳风

And it left us the Moon that provides climatic stability.

还留下了一个月球来确保气候的稳定

If the collision had never happened,Earth may never have been a home to complex life.

如果没有这次撞击 地球永远不会成为复杂生命的家

We've seen the extraordinary consequences of just one chance event on the Earth's destiny.

我们看到地球命运一次意外 就带给我们多么不寻常的结果

But there's another chance factor that was just as vital,its location.

但是还有一个因素也很重要 它的位置

It's only when you consider our planet's position in the solar system

只有思考一下我们的星球在太阳系中的位置

that you really begin to understand how fortunate it's been.

你才真的意识到我们多么幸运

Too far from the Sun, like Mars, and it's simply too cold for life.

如果离太阳太远，像火星那就会太冷，不适宜生命生长

A little closer and things improve.This is where you find the Earth.

离太阳稍微近一点就好了 你会发现地球在这里

We are lucky enough to be in the only place

我们很幸运占据这个太阳系唯一的位置

in the solar system, to our knowledge, that's the right temperature for water,

这里的温度适合水存在

the most essential ingredient for life to exist on the surface.

水是生命存在的最关键因素

重点讲解

1、extraordinary

非凡的;优秀的;出色的

We've made extraordinary progress as a society in that regard.

在那个方面，我们的社会已经取得了巨大的进步。

The task requires extraordinary patience and endurance.

那项任务需要非凡的耐心和毅力。

非常奇特的;令人惊奇的

What an extraordinary thing to happen!

这事儿真蹊跷！

His decision to hold talks is extraordinary because it could mean the real end of the war.

他作出举行谈判的决定非同寻常，因为这可能意味着战争真的要结束了。

（会议）特别的

at an extraordinary meeting of the sport's ruling body.

在体育运动管理机构的特别会议上

Representatives of the colonies met in an extraordinary congress.

各殖民地代表在一次特别大会上会面。

2、essential

绝对必要的;必不可少的;基本的

It was absolutely essential to separate crops from the areas that animals used as pasture.

将庄稼和放牧区分开绝对必要。

As they must also sprint over short distances, speed is essential.

由于他们也必须进行短跑，因此速度至关重要。

基本的;本质的；根本的

Most authorities agree that play is an essential part of a child's development.

大多数权威人士都同意，玩耍在孩子成长过程中起着非常重要的作用。

In this trial two essential elements must be proven: motive and opportunity.

在这次审讯中，必须证明两个基本因素：动机和时机。

（某学科的）基础，基本知识

the essentials of everyday life, such as eating and exercise.

饮食、锻炼等日常生活的要素

This has stripped the contest down to its essentials.

这就使比赛精简到最基本的环节。