How long does it take for the population of cells to double?

一组细胞的倍增时间是多久呢

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I'm going to live here for, who knows how long. Quite a long time.

我打算定居在这儿，不知道多久。会是相当长一段时间。

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How long does it take to get to my home?

从这里到我家要花多久时间？

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