This involves deciding on the level of granularity of the functions to be exposed as web services to avoid unnecessary message exchanges across the Internet.

这包括决定作为Web服务公开的函数的粒度来避免跨internet的不必要的消息交换。

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SOAP also provided the hooks for easy extensibility, so that higher-level infrastructure functions could be added to enhance XML message exchange in the future.

SOAP还提供了各种挂钩(hook)机制，以方便扩展，从而可以添加高级基础结构功能，以增强未来的XML消息交换。

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MTP Level 3, the network layer, provides message handling and network management functions and procedures.

MTP第3级，网络层，提供消息处理和网络管理功能和过程。

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