但是，大水坝往往不按预期工作。

But big DAMS tend not to work as intended.

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他告诉我们人们将在他家乡建一个大水坝。

He told us that people would build a big reservoir in his hometown.

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在位后，胡见证了世界最大水坝-三峡大坝的竣工。

When in office, Hu saw the Three Gorges dam, the largest dam in the world, completed.

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