Concrete was invented by the Romans 2,000 years ago,

罗马人早在2000年前就发明了混凝土

but the Hoover Dam is the first large concrete dam in history.

但胡佛水坝却是历史上第一座由混凝土建成的大坝

Today virtually all dams are made of concrete.

现如今，几乎所有的水坝均由混凝土建成

It's malleable and it's strong.

凝土易成形又很坚固

It's the world's favorite building material for any structure.

是建筑中使用最广泛的材料

Frank is up against the clock, and he has a big problem.

时间紧迫 弗兰克需要解决一个重大问题

The curing concrete generates heat.

混凝土凝固过程中会释放热量

If the dam were constructed in a single, continuous pour,it would put out enough heat to bake half a million loaves of bread every day for three years.

若这些混凝土一次性持续倾倒，产生的热量足以连续三年每天烘烤50万片面包

But worse, the dam would take 125 years to harden.

更糟的是 这让大坝要过125年才能完全硬化

Frank Crowe's got no time for that.

弗兰克·克罗可等不起

Backs against the wall, we figured out who we were.

无路可退 我们终于真正认清自己

We worked our way out of that Depression.

拼尽全力 安然度过了大萧条时期

The secret of cooling the concrete lies within the dam itself.

让混凝土冷却下来的法宝就藏于大坝之内

582 miles of 1-inch pipes carry ice-cold water from the very river the dam is taming.

直径1英寸总长582英里的水管，自大坝所要制服的科罗拉多河引来冰冷的河水

No one had ever thought of this before,and those pipes are still in the Hoover Dam today.

那是一次创举，这些水管如今依然留在胡佛大坝中

Frank "Hurry Up" Crowe lives up to his name.

弗兰克·克罗 未辜负其快手之名

The Hoover Dam is completed on September 30,1935,

胡佛大坝于1935年9月30日竣工

two years ahead of schedule.

提前两年完工

Frank receives a bonus worth over $4 million in today's money.

弗兰克获得了一笔相当于如今400多万美元的巨额奖金