批处理应用程序负责业务服务，如计算信用评级、应用利息计算等。
Batch applications are responsible for business services like calculating credit ratings, applying interest calculations, and so on.
本章的内容包括资产证券化的信用级别对资产证券化的作用，信用升级的目的和形式，信用评级的程序等。
It includes the function on the credit rank of asset securitization, the purpose and form the credit upgrades, the procedure of credit rating.
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