NAT 仅转换在内部和外部网络之间被指定需要被转换的流量。
NAT only translates traffic which travel between the inside and outside network and is specified to be translated.
通过高速网络和智能手机，任何人通过身份核验后都可以成为一名线上教师，并且任何拥有线上账户的人都可以以实惠的价格购买自己需要的“知识付费”产品。
With a fast network and a smartphone, anyone who has passed the identity (身份) check can be an online teacher, and anyone with an online account can buy "pay for knowledge" products that he or she wants at an affordable price.
您将需要硬件、软件和网络专业知识。
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