纪录片《地球的力量》第二集 大气03:对流层

We humans are perfectly adapted to survive at ground level,

我们人类完全适合在地表上生存

where the air has all the right conditions for life.

地表大气的状况正适合生命的存在

It's the right temperature, right pressure

合适的温度，合适的气压

and it's got the right mix of gases.

合适的大气的组成成分

Down here, there's plenty of oxygen about,

下边这儿，有足够的氧气

but after about three kilometres the air's so thin,

但是大约三千米以后空气会很稀薄

if you didn't have this mask, you'd slip into unconsciousness.

所以如果没有这个防护面具，你会变的意识不清

I'd better put it on.

我最好还是戴上

121, continue your approach. Flight information...

一二一，起飞

The atmosphere that surrounds our planet

我们周围的大气

is made up of four key layers, each very different.

由四个主要的大气层组成，每一个都不同

Although I'm above the clouds, I'm still at the very bottom,

尽管是在云彩上面，我仍然是在大气层的底部

in a layer called the troposphere.

这个气层叫做对流层

It's a narrow band,

它宽度很窄

usually more than six miles thick.

通常超过6英里的厚度

The troposphere is a rich soup of oxygen-rich air.

对流层是一个充满暖湿氧气的气层

It's unstable, chaotic and unpredictable but life depends upon it.

它很不稳定，空气运动不规则而且不可预知，但是生命的存在取决于它

And in just a couple of minutes, I'll be leaving it behind.

只是在几分钟之后，它就会在我下面了

And now I'm 40,000 feet above the Earth.

我现在离地球有4万英尺高

重点讲解

1、perfect

完美的；最佳的

He spoke perfect English.

他英语说得棒极了。

Hiring a nanny has turned out to be the perfect solution.

雇用保姆结果成了解决问题的最佳方法。

绝配的；十分合适的

Carpet tiles are perfect for kitchens because they're easy to take up and wash.

方块地毯非常适用于厨房，因为其便于揭起来清洗。

So this could be the perfect time to buy a home.

所以这可能是买房子的绝佳时机。

无瑕的；完好的；完美无缺的

Use only clean, Grade A, perfect eggs.

只用表面干净、无磕碰的A级鸡蛋。

their perfect white teeth.

他们洁白无瑕的牙齿

2、put on

穿；戴；涂；抹

She put on her coat and went out.

她穿上大衣出去了。

Maximo put on a pair of glasses.

马克西莫戴上了一副眼镜。

上演；举办；展出

The band are hoping to put on a UK show before the end of the year.

那个乐队希望年底之前在英国举办一场演出。

British Airways is putting on an extra flight to London tomorrow.

英国航空公司明天将增加一班到伦敦的航班。

增加（体重）

I can eat what I want but I never put on weight.

我能想吃什么就吃什么，但是体重从来不增加。

Luther's put on three stone.

卢瑟体重增加了3英石。

3、unpredictable

无法预言的；不可预测的；难以预料的

He is utterly unpredictable.

他是个高深莫测的人。

Britain's notoriously unpredictable weather.

众所周知，英国的天气一向变幻莫测