因为这些数据是以有已知生育问题的男性为基础而得出的，所以还不清楚它是否适用于同年龄的所有男性。

Because the data are based on men with known fertility problems, it's not clear whether the results apply to all men as they age.

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IRR经常用于资本预算，它是使得所有现金流动的净现值为零的利率。

Often used in capital budgeting, IRR is the interest rate that makes net present value of all cash flow equal zero.

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Arch的优势之一是虽然它是为分散操作所设计的，但也可以用于集中存储库范例。

An advantage to Arch is that while it was designed for decentralized operation, it can also be used in the centralized repository paradigm.

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