一些人估计通过电子方式产生的信用违约掉期接近万亿美元，而它们都没有正式文件证明而且难于理解。

By some estimates close to a trillion dollars in credit default swaps out there were created electronically and are now undocumented and little understood.

youdao

一些人估计通过电子方式产生的信用违约掉期接近万亿美元，而它们都没有正式文件证明而且难于理解。

By some estimates close to a trillion dollars in credit default swaps out there were created electronically and are now undocumented and little understood.

youdao