电子的商业能被定义为价值的在线交换。
Electronic commerce can be defined as an online exchange of value.
不过，创办一个网站让我和朋友能在线交换货物则是另外一个故事了。
My desire to start a website that would enable me and my friends to trade goods online is a whole other story, however.
这种标记语言定义并保持了一种基于XML的标准框架，用于在在线合作伙伴之间创建和交换安全信息。
This markup language defines and maintains a standard XML-based framework for creating and exchanging security information between online partners.
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