求翻译：自2007年夏季，美国爆发次贷危机。从危机的演变过程看， 其直接源于美国房地产市场中资产证券化和住房抵押贷款证券化所引发的金融衍生品的膨胀与泛滥，其次金融衍生品市场是什么意思？

Since the summer of 2007, the United States subprime mortgage crisis broke out. Look at the evolution of the crisis, directly from the expansion of financial derivatives and asset securitization in the U.S. real estate market and mortgage securitization triggered flooding, followed by financial deri

In the summer of 2007, the United States subprime mortgage crisis erupted. From looking at the evolution of the crisis, the process in the United States derives directly from the real estate market asset securitization and mortgage securities, the cause of the financial derivatives, and the second e

From 2007 the summer, US erupts the loan crisis.Looked from the crisis successional variation process that, its direct source which the property securitization and the housing mortgage loan securitization initiates the finance grows the inflation in the US real estate market with to be in flood, nex

Since the summer of 2007, United States subprime mortgage crisis broke out. From the perspective of evolution of the crisis, directly from the United States in the real estate market in asset securitization of housing mortgage loan securitization and derivatives expansion caused by flooding, followe

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