The interest rate has units of time, so I have to specify a time period over which I'm measuring an interest rate.

不同时间段有不同的利率,因此我必须在不同的时间段,细化不同的利率

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And you could think to yourself 'That question is too broad, I need to be more specific.'

你可能暗自忖度，这个问题太宽泛了，我得更细化一些。

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