THE Earth is a recycling scheme that has been running for a third of the age of the universe.

地球是一个1/3宇宙寿命间一直运转的循环系统（45/46亿年来，地球一直绕太阳运转，是个循环系统）。

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THE Earth is a recycling scheme that has been running for a third of the age of the universe

地球是个循环系统，宇宙年龄的1/3年间以来一直在/保持运转着

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Note that the present age of the universe follows from the expansion history and present expansion rate.

请注意，目前的宇宙年龄是由宇宙当前的膨胀速率所估计的。

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Astronomers' latest estimates put the age of the universe at about 13.7 billion years.

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