我现在正在帮我的一个朋友来提高英语，我们就是通过网络约定时间定时练习的。
I am working with a friend right now that needs much practice and we have made arrangements to practice by Internet.
它为通过网络消息传输的XML信息提供了标准的信封，并为这类消息体提供了可选的约定。
It provides a standard envelope for XML information to be transmitted through network messages, and optional conventions for the body of such messages.
在点对点上下文中，此命名约定有助于对网络中的消息流做文档记录。
In a point-to-point context, this naming convention helped to document the flow of messages in the network.
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