Here, the variables blue and none are expanded when the command line is interpreted, and the prompt is set to the string that results from the expansion.

在解释命令行时，会展开变量blue和none，提示符被设置为展开变量而生成的字符串。

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Here, the variables blue and none are expanded when the command line is interpreted, and the prompt is set to the string that results from the expansion.

在解释命令行时，会展开变量blue和none，提示符被设置为展开变量而生成的字符串。

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