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Outside experts studied the dam and ordered small changes .

外国专家对大坝研究之后吩咐某些方面要稍加改动。

Unfortunately , an earthquake might liquefy the core of the dam .

不幸地是，一次地震就可能将水坝的关键之处毁于一旦。

Green dam has the potential to tighten this .

绿坝有可能加强这类监管。

But admirers of the dam are not yet declaring victory .

不过那些对三峡大坝赞赏有加的人还未宣布胜利。

He didn 't know whether it was done for the zipingpu dam .

他不知道紫坪埔大坝是否经过了这样的评估。