There's a common theme to the greatest innovations in American history,

在美国历史上最伟大的创新都有一个共同的主题

and that is these were things that helped people or goods or ideas travel about more freely.

即是为了帮助实现人、商品、思想更自由地流动

The Interstate Highway becomes the biggest engineering project in American history.

州际高速公路成为美国史上最大的工程

It costs the nation $129 billion.

耗资1290亿美元

2.4 billion man hours of hard work.

24亿个艰苦工时

And just like the railroads a century before it's built with manual labor and sheer grit.

就像一个世纪之前的铁路一样，它建立在人力的劳作和无畏的精神之上

America's landscape has been shaped by transportation.

美国地貌由此被运输改变

The transcontinental railway opened up half a billion acres of land and 8 new states.

横贯大陆的铁路开发了5亿英亩的土地 催生了8个全新的州

200,000 miles of track huhn out of hostile terrain.

20万英里的铁轨从险峻的地形中喷薄而出

Faced with a mountain,find an inventive way of blowing it up.

面对崇山峻岭 千方百计把它攻克

Nitroglycerin, black powder, dynamite.硝化甘油 黑火药 炸药

The Interstate is the largest earth-moving project in the history of the world.州际高速公路工程建设的运土规模之宏大在世界上无出其右

One and a half million tons of explosives.

动用了150万吨炸药

4.2 billion cubic yards of earth removed.

搬运了42亿立方码的泥土

Enough to fill more than 8 million football stadiums.

足以填满800万余个足球场

We can build anything, we damn will, please,

只要想建 我们没什么建不成的

we're going to go about it.

现在轮到了州际公路

And it did change the country.

它也确实改变了美国

The Freeways, the Interstate Highway System.

高速公路 州际公路系统

It connected the cities in a way that no one had seen before on a level no one had seen before.

把各个城市以一种前所未有的方式连接起来 超乎任何人的想象

Today there are 46,876 miles of Interstate Highways.

如今 州际高速公路总长46876英里

Enough to wrap nearly twice around the world.

足以把地球绕上两圈