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We're approaching 45,000 feet
我们即将到达四万五千英尺高
and we're about to cross an invisible boundary in the atmosphere.
我们将穿过大气层中无形的分界面
We're leaving behind the first layer, the troposphere,
我们将要离开第一个大气层，对流层
and entering the stratosphere.
进入对流层
A very different place.
一个完全不同的地方
Here the air is stable and exceptionally dry,
这的大气很稳定并且非常的干燥
so there's virtually no weather.
所以这几乎没有天气的变化
The stratosphere is home to the ozone layer
平流层是臭氧层的家
which reduces the amount of lethal solar radiation reaching the Earth.
臭氧可以削弱到达地球的来自太阳的致命的辐射
We've reached 50,000 feet
我们已经到达5万英尺了
Nearly 80% of the mass of gases that make up the atmosphere are below me.
几乎组成大气的90%的气体都在我下面了
But almost 50 years ago, one man went much, much higher than me,
但是大概50年前有人比我去的地方高的多的多
and he experienced the atmosphere in a completely different way.
他以一种完全不同的方式体验了大气
On August 16th, 1960,
1960年8月16号
long before man had set foot on the Moon,
在人类踏上月球之前很长时间
military pilot Joe Kittinger
军事飞行员 乔.奇廷格
took a solo journey to explore the heavens.
独自一人到太空的边缘旅行了一次
