You must have an in-depth understanding of the data layout when rewriting those parts of the source code that are implemented in assembler.

要重新编写在汇编程序中实现的源代码的各个部分时，您必须对数据布局有深刻的理解。

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Typically, each view in a utility application provides the same organization of data and depth of detail, but can be served by a different source.

通常，实用程序的每一个视图都提供相同结构的数据和细节深度，但（这些数据）可以是不同的来源。

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Data source: Focus group discussions, in-depth interviews, Participatory method, questionnaires, observations of surroundings, and collected documents.

资料来源：专题小组讨论、个人深入访谈、参与性方法、问卷、观察当地和居民的物质环境、现有资料。

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