A single channel of communication must exist between the project sponsor and the project team leader for all decisions affecting the product scope.
必须在项目发起人和项目组长之间存在单通道通讯，从而使得所有的决策能够影响到整个产品。
Figure 3 clearly shows the scope of a channel and the current channel associated with the program.
图3清楚地展示了管道的作用域和与程序相关联的当前管道。
A channel will be deleted automatically when it goes out of scope, that is, when no program can access it.
当管道超出了作用域范围(即程序不能访问它)时，将被自动删除。
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