Understand the system context diagram to draw requirements for stubs.
了解系统上下文关系图，以确定对存根的需求。
A system context diagram (for example, Figure 1) that shows the portal in context with the other systems.
显示门户与其他系统之间的关系的系统环境关系图(如图1)。
When documented adequately, the previous information should provide a good description of the system context diagram.
记录信息足够的情况下，前面的信息应该能提供系统上下文关系图很好的描述。
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