In four historic years, America has been given great tasks and faced them with strength and courage.

在四年历史性时期，美国被赋予了伟大的任务，并以实力和勇气面对这些任务。

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For four years, we spent our childhood holidays and vacations in the historic house. We could almost feel the presence of all the great men and women who had lived here before us.

我们在这个古老的房子里度过了四年童年的节日和假期，我们几乎可以感觉到之前住在这儿的伟大人物的音容。

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In four historic years, America has been given great tasks and faced them with strength and courage.

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In the four years prior, there had not been a historic collapse in economic growth that made the base year of 1878 low, as was the case in 1933.

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But, the consequences of continued slow growth and high unemployment fall most heavily on the least skilled and those who lose their job or the opportunity for a better life, to say nothing of the broad middle class that has suffered a historic decline in median income during the past four years.

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