And so frequently what we try and do is, we take a new problem and map it onto an old problem so that we can use an old solution.
我们经常做的一件事就是,我们处理一个新问题时,把它归结为一个老问题,以便我们能采取老的解决方式。
It's one of the questions of economics -what determines the term structure?
经济学中的一个老问题是,期限结构是由什么决定的呢
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