Permission Email Marketing (PEM), a permitted electronic network marketing, is the main marketing form of one-to-one in the information age.
经过客户许可的电子网络营销形式，是信息时代一对一营销的主要形式。
Permission Email Marketing (PEM), a permitted electronic network marketing, is the main marketing form of one-to-one in the information age.
经过客户许可的电子网络营销形式，是信息时代一对一营销的主要形式。
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