The external or "black box" view is what consumers of the service provider see.

外部的或者叫做“黑盒”视图是呈现给服务提供者的消费者查看的。

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Is a "black box" to consumers of the service.

对服务的消费者而言是“黑盒”。

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This leads to a "black-box" usage model, where a service may utilize other services without the client's knowledge, thereby propagating changes with secondary effects.

这导致“黑盒”使用模式，一个服务在不知道客户端知识的情况下利用其他服务，因而传播带有二次影响的变更。

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