在呼叫中心和电话银行系统中的应用很广泛，因为在这些系统中顾客都有可能会需要额外的服务。
It's widely used in call center and telephone banking system. Because customers in these systems will probably request a extra service.
电话银行是银行系统的必备服务手段之一。
Telephone bank system is one of the indispensable service to bank.
电话银行是银行系统的必备服务手段之一。
Telephone bank system is one of the indispensable service to bank.
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