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电子商务的系统组成包括电子商务应用层结构（简称应用层）和支持应用实现的基础结构（三层），基础结构一般包括三个层次和两个支柱。三个层次自下而上分别为网络层、传输层和服务层，两个支柱分别是安全协议与技术标准、公共政策与法律规范。
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