This system realizes whole working course of full-automatic washing machine, including four parts: user parameter input, wash, dehydrate and ending music play.

本系统实现了对洗衣机整个洗衣过程的控制，包括用户参数输入、洗衣、脱水和结束演奏四个阶段。

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If this were more than a demo, some other logic would choose the parameter, perhaps prompting the user to supply the information.

如果这不仅仅是一个演示的话，某些其他的逻辑将选择参数，可能会提示用户提供该信息。

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This method expects a String user role-name parameter.

此方法接受一个用户角色名的字符串参数。

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