80年代中期，华尔街求助计量经济学 ——聪明的金融工程师——以发明新的方法来增加利润。

In the mid-80s, Wall Street turned to the quants—brainy financial engineers—to invent new ways to boost profits.

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但2008年中期突发的全球金融危机挽救了这些开发商。

But the global financial crisis, which started suddenly in mid-2008, rescued them.

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虽然金融危机可能会在短期到中期造成严重困难和减缓经济增长，但其持续时间很少超过两三年。

While financial crises may cause serious hardship and reduce growth over the short - to medium-term, they rarely last more than a few years.

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