To complete the use-case analogy, please note that the performing roles of a task do not map to use-case actors because actors are external users.
为了完成用例类推，请注意任务中的执行角色不应和用例角色相互映射，因为角色是外部用户。
To complete the use-case analogy, please note that the performing roles of a task do not map to use-case actors because actors are external users.
为了完成用例类推，请注意任务中的执行角色不应和用例角色相互映射，因为角色是外部用户。
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