Historians may re-examine the mistakes of the past in the hope of providing warnings for the future, but at the same time caution their readers to preserve what is of value.

历史学家检讨过去的错误，以作将来的警戒。但同时也要忠告读者，保全有价值的事物。

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Historians may re-examine the mistakes of the past in the hope of providing warnings for the future, but at the same time caution their readers to preserve what is of value.

历史学家检讨过去的错误，以作将来的警戒。但同时也要忠告读者，保全有价值的事物。

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