换句话说，虚拟水的价值不是提供确切的数据，而是让人们意识到种植不同的作物可能使境况更好，或者把他们的工业转移到其它国家。

In other words, the merit of virtual water is not to give precise figures but to alert people that they might be better off growing different crops, or moving their manufacturing to another country.

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