First of all, it draws a frame round of grace period and analyses grace period ring upon ring on the base of interest balance theory.

首先搭建宽限期的理论框架，以利益平衡理论为基础层层深入。

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First of all, it draws a frame round of grace period and analyses grace period ring upon ring on the base of interest balance theory.

首先搭建宽限期的理论框架，以利益平衡理论为基础层层深入。

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