Learn from yesterday, live for today, hope for tomorrow.

以昨天为鉴，以今天为乐，以明天为盼。

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Learn from yesterday. Hope for tomorrow. But live for today.

从昨天学习，寄希望于明天，但要活在当下。

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Learn from yesterday, live for today, hope for tomorrow -albert Einstein.

学习昨天，活在今天，期待明天。

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Science editor Alan Boyle's blog: Researcher Jared Diamond, the author of "The World Until Yesterday, " says Congress could learn a lesson from tribal societies: Listen to your elders.

MSN: Massive meteorite crater found in Canadian Arctic