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Men who worked at night on the dam suffered less, but the heat was still as high as thirty degrees Celsius.
VOA: special.2009.08.12
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And if the distance between the wall and the dam was large in comparison to the wavelength then what happens?
如果水槽壁,和屏障之间的距离,大于波长,会导致什么？
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As you can see, I work here in the Macombs Dam Park where the track is at.
正如你所看到的，我在这里的梅可姆公园工作，那条小路就在那儿。
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Before he was president, Mister Hoover worked for many years to make the construction of the dam possible.
VOA: special.2009.08.12
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If this distance is large in comparison to the wavelength, this dam simply casts a shadow.
如果这个距离,比波长更长，水槽中的屏障就会投下阴影。
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Men in two special factories worked day and night to make the concrete building material for the dam.
VOA: special.2009.08.12
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For example, you could put a dam in the middle of the tank.
举个例子,在水槽中间放个屏障。
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She wanted to tell the story of the people behind the industry: In this case, the people who were building the dam.
VOA: special.2009.05.17
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They enter a special visitors' center to learn about the dam and the men who built it.
VOA: special.2009.08.12
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He said the dam should be built in an area called Boulder Canyon on the border between the states of Arizona and Nevada.
VOA: special.2009.08.12
-
Bourke-White took pictures of those people C at the dam,in the rooms where they lived, and in the places where they had fun.
VOA: special.2009.05.17
-
Workers also used more than twenty million kilograms of steel to strengthen the concrete in the dam.
VOA: special.2009.08.12
-
Workers built a town called Boulder City to house employees working on the dam.
VOA: special.2009.08.12
-
They built a large road from Boulder City to the area of the dam.
VOA: special.2009.08.12
-
The small shapes of two men at the bottom showed the dam's huge size.
VOA: special.2009.05.17
-
This had to be done so the floor of the dam could be built.
VOA: special.2009.08.12
-
Workers called "high scalers" were some of the first to begin building the dam.
VOA: special.2009.08.12
-
They had used almost four million cubic meters of concrete in the dam.
VOA: special.2009.08.12
-
A great deal of work was done before operations started on the dam.
VOA: special.2009.08.12
-
This provided electric power to the area where the dam was being built.
VOA: special.2009.08.12
-
Water over the dam is an expression about a past event.
VOA: special.2009.05.10
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The light on the rounded supports showed the dam's great strength.
VOA: special.2009.05.17
-
The work on the dam began in April of nineteen thirty-one.
VOA: special.2009.08.12
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The dam is in the Black Canyon, near Las Vegas,Nevada.
VOA: special.2009.03.04
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They ride high-speed elevators that go deep inside the dam.
VOA: special.2009.08.12
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Building the dam would not be a simple matter.
VOA: special.2009.08.12
-
The dam in Montana was a federal project.
VOA: special.2009.05.17
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You say it is water over the dam.
VOA: special.2009.05.10
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This river made the dam necessary.
VOA: special.2009.08.12
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Naysayers warned of a catastrophic flood should the dam break, but amid the prosperity, the warnings were ignored.
VOA: standard.2010.04.26
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