除此之外，他们假设发送端和接收端充分了解消息的前后关系，因此对诸如参数名称或类型的任何元信息都不编码。

In addition, they assume that both the sender and the receiver have full knowledge of the message context and do not encode any meta-information such as the names or types of the arguments.

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在客户端，当一名用户发送或接收一个文件附件时，客户机代码必须处理base64编码，并自行解码。

On the client side, when a user sends or receives a file attachment, the client code has to handle the base64 encoding and decoding itself.

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在这八个成分中，编码和解码具有特别的意义，因为通信是通过将消息编码为信号并通过在接收端解码该信号来实现的。

Among these eight ingredients, encoding and decoding are of special significance because communication is achieved by encoding a message into a signal and by decoding this signal at the receiving end.

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