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The recognition that things that are not sustainable will eventually come to an end does not give us much of a guide to whether the transition will be calm or exciting.

认识到不可持续的事情最终将会结束，这并不能给我们多少指引，让我们知道转型将是平静的还是激动人心的。

— Timothy Geithner 蒂莫西·盖特纳