因此，人们可以使用一个瘦客户，也可以使用胖客户端，硬件可以随时变换，软件运行的操作系统也可以被改变或更新，但使用者却不受影响。

So, the person could use a thin client or a thick one, the hardware could be changed in time, the operating system it runs upon could be changed or updated, but the user should not be affected.

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RPC引入的第一个有价值的概念是称为服务器的服务提供者和称为客户端的服务使用者。

The first valuable concept that was introduced by RPC was that of a service provider, called a server, and a service consumer, called a client.

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在面向服务的模型中，我们通常关注可供很多任意“客户端”使用的服务的提供，即我们从“提供者到使用者”的角度看待问题。

In the service oriented model we are typically focused on the provision of services that can be consumed by many and arbitrary 'clients'; that is, we take a provider-to-consumer view of the world.

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