The dam backs up a large lake.
大坝将水堵住而成一个大湖。
The dam would create a lake of up to 450 square KMS (175 square miles), flooding some 60 villages, as well as roads and forest.
Inambari大坝将创造一个高达450平方公里的湖泊，淹没约60个村庄，还有公路和森林。
There we saw a huge dam backing up the lake.
那儿，我们看见一座巨型拦湖大坝。
There we saw a huge dam backing up the lake.
在那儿我们看见一座巨型拦湖水坝。
Environmentalists warned before the dam was built that it would be hard to prevent toxic pollution from building up in the lake once the river was no longer carrying pollution out to the ocean.
环境专家在大坝建造前就警告，一旦长江不再将污染物流入海洋，水库就很难防止库区建设产生的污染。
When the dam is completed, it will back up a large lake.
大坝建成后会将水堵住形成一个大湖。
Man can make artificial lakes (3) by building dams across rivers. The river water backs up behind the dam, and a lake is formed.
人类筑坝拦河，可以修建人工湖。河水被拦在大坝后面，形成湖泊。
Man can make artificial lakes (3) by building dams across rivers. The river water backs up behind the dam, and a lake is formed.
人类筑坝拦河，可以修建人工湖。河水被拦在大坝后面，形成湖泊。
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