Finally, I create a new instance of the Md5ReportBuilder class, calling two methods to handle the needed functionality.

最后，我创建Md 5reportbuilder类的新实例，调用两个方法处理所需要的功能。

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The responsibility of calling the right methods on the right instance of an object rests on the user of a DLL.

获取正确对象的合适的方法的责任落在DLL的使用者的肩上。

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