The Spaniards never found or they would have destroyed it," After the Incan civilization collapsed, the site was abandoned and the rainforest overgrew it for 400 years.

VOA: standard.2009.12.15

They became almost worthless because they were investing in subprime debt and the value of the debt collapsed and so these collapsed as well.

它们变的分文不值,因为它们投资次级债务,而这些债券价格一落千丈,所以这些银行也跟着倒下

耶鲁公开课 - 金融市场课程节选

These names sound safe -High Grade, Enhanced -but they both collapsed and became leveraged fund.

这俩名字听着多有安全感,高级,增强,但两者最后都崩溃了,变成了杠杆资金

耶鲁公开课 - 金融市场课程节选