如有存在中介服务，则买卖交易就被称为电子商务，比如易趣网。
If an intermediary is present, then the sale and purchase transaction is called electronic commerce such as eBay. com.
换句话来说，电子商务是指通过私人或公众网络来买卖或交换货物和服务。
In another word, electronic commerce is the buying, selling and trading of goods and services through private and public networks.
最初的商务网站跟一个电子买卖窗口的作用很像，在那里浏览者可以有效的看见商品和服务，但是他们不可以直接购买他们。
The initial use of commercial web sites was effectively as an electronic 'shop window', where visitors could see product and service availability, but could not purchase them directly.
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