Workers began to build Hoover Dam in nineteen thirty-one.

VOA: special.2009.03.04

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。

麻省理工公开课 - 固态化学导论课程节选

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。

在梅可姆公园 - SpeakingMax英语口语达人

The dam in Montana was a federal project.

VOA: special.2009.05.17

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？

麻省理工公开课 - 固态化学导论课程节选

Environmental activists say plans by Laos to build a dam in the Don Sahong area near the Cambodian border could doom the nearly extinct Irrawaddy dolphin.

VOA: standard.2010.01.11

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。

麻省理工公开课 - 固态化学导论课程节选

Russians were awoken to the threat posed by the destruction of a hydroelectric plant last year, when a major accident at the Sayano-Shushenskaya dam in Siberia threatened the lives of millions of people downstream.

VOA: standard.2010.07.21

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

Men in two special factories worked day and night to make the concrete building material for the dam.

VOA: special.2009.08.12

In nineteen eighteen, a man named Arthur Davis proposed building a dam to control the Colorado River.

VOA: special.2010.10.27

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

It was a picture of a new dam being built in the western state of Montana.

VOA: special.2009.05.17

They had used almost four million cubic meters of concrete in the dam.

VOA: special.2009.08.12

Hoover Dam also created Lake Mead, the largest man-made lake in America.

VOA: special.2009.03.04

The work on the dam began in April of nineteen thirty-one.

VOA: special.2009.08.12

The dam is in the Black Canyon, near Las Vegas,Nevada.

VOA: special.2009.03.04

The surge came from a sudden release by a hydropower dam further up the river in the North's territory.

VOA: standard.2009.09.07

High in those mountains, behind a crude earthen dam, wealthy Pittsburgh industrialists and their friends sailed yachts on a pretty private lake.

VOA: standard.2010.04.26

This man said at about five o'clock in the morning, he heard the dam collapse and all of sudden the water rushed towards the houses.

VOA: standard.2009.03.27

Both subjects are high priority for Seoul. Six South Koreans drowned last month when the North suddenly released water from a dam, flooding camping areas in the South.

VOA: standard.2009.10.13