计算机到计算机的呼叫是免费的。

PC-to-PC calls anywhere in the world are free.

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根据所发布的标准，EDI是计算机到计算机的严格的消息交换格式。

According to the issued publication, EDI is the computer-to-computer interchange of strictly formatted messages.

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电子数据交换(EDI)是一种软件之间业务消息从计算机到计算机的直接传输，它使用了一个标准的消息格式。

Electronic data interchange (EDI) is the direct computer-to-computer transfer of business information between applications using a standard message format.

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