然后描述了系统总体设计和功能模块设计过程，其中包括对数据库的设计、系统功能结构图等。
The overall layout and functional modules, including database design and system function diagram , are described in the second step.
在系统分析中先后用数据流程图、系统的功能结构图分析了BBS系统所需的各种数据。
Successively used the data stream chart the system function structure drawing in the system analysis to analyze each kind of data which the BBS system needed.
其次，确定系统中的功能模块的划分，明确各模块的功能点，建立系统整体功能结构图。
Secondly, the function modules are compartmentalized, function points of every module are defined also, the total function structure chart is established in the end.
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