The billing policies are not part of the service; they constitute an external element that the billing service makes use of.
账单策略并不是账单服务的组成部分；它们是账单服务使用的外部元素。
The billing policies are not part of the service; they constitute an external element that the billing service makes use of.
账单策略并不是账单服务的组成部分；它们是账单服务使用的外部元素。
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