These use cases are grouped in four major functional areas based on the main actor that initiates the use cases, as shown in Figure 5.
这些用例根据发起用例的主要参与者归入了四个主要功能区域，如图 5 中所示。
These use cases are grouped in four major functional areas based on the main actor that initiates the use cases, as shown in Figure 5.
这些用例根据发起用例的主要参与者归入了四个主要功能区域，如图 5 中所示。
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