We first define two roles, cashier and manager.

首先定义两个角色，收银员和经理。

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These roles are needed to use the job manager.

使用作业管理器时需要这些角色。

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Reflection on the two roles of the manager will lead to a conclusion .

对主管人员这两种作用的看法将导致一个结论。

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Reflection on the two roles of the manager will lead to a conclusion .

对主管人员这两种作用的看法将导致一个结论。

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