这允许您一次性创建内容和服务，并将其呈现在不同设备上而无需进行任何其他改编。

This enables you to create content or services once, and present them on many different devices without any additional rework.

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这种一次性设置每个远程服务都需要添加。

This one-time set-up is required for each remote service.

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如果用于客户端一次性访问的服务，由于客户端和STS之间消息交换的原因，实际是增加了开销。

If you use it for a service that clients access on a one-off basis, you'll actually be adding a lot of overhead that's due to message exchanges between the client and the STS.

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