电子商务不是经由纸张或电话发送订单，而是通过计算机网络。
Instead of sending an order on paper or by telephone, e-commerce arranges for orders to be sent over a computer network.
电子商务安全包括计算机网络安全和商务交易安全。
Electronic commerce consists of network security and business transaction security.
随着电子商务时代的来临，PK I技术正逐渐成为计算机网络安全的主角。
With the coming of electronic commerce, the PKI technology is gradually playing the leading actor of computer network security.
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