结合项目实际，说明了它的结构和工作原理，该法提高了编程工作的专业化水平和代码的可重用性，增加了可维护性。
The structure and working theory of data mapping tier is explained, and the method can improve the specialization of programming, reusability and maintainability of code.
结合项目实际，说明了它的结构和工作原理，该法提高了编程工作的专业化水平和代码的可重用性，增加了可维护性。
The structure and working theory of data mapping tier is explained, and the method can improve the specialization of programming, reusability and maintainability of code.
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