我们已经拦河筑坝、排干湿地。
在英国境内，为水磨运行而进行的拦河筑坝是小规模的，可再生的，风景如画的，但是也是破坏性的。
The damming and weiring of British rivers for watermills was small-scale, renewable, picturesque and devastating.
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。
Man can make artificial lakes (3) by building dams across rivers. The river water backs up behind the dam, and a lake is formed.
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