This value can be measured by comparing the "cost" of the input requirements to the system with the "value" of the functional outputs of the system.

这种价值可以通过系统输入的代价与输出的成果之间的对比来进行衡量。

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There also may be a cost benefit to the airline, if Delta can reaccommodate passengers on overbooked flights by handing out travel vouchers of lesser dollar value than under the prior system.

如果达美航空通过这种方式，发放旅行代金券的价值低于之前所采取的方式，那么这将可能为达美航空带来成本节省。

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Practice prove that the system has high reliability, stability and low cost, a strong, weak control and higher value are achieved.

实践证明该系统可靠性高，工作稳定，成本低，实现了弱电控制强电，有较高的应用价值。

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