Reciprocity works in the same that permission-based marketing does; you give something to get something at every step in the process.
“互惠”和基于许可的行销的运作方式是同样的，在这个过程中每一步你都要给出某样东西来获得某样东西。
As the popularity of permissio based email marketing grows, so does the volume of email in every consumer inbox.
随着许可邮件营销广受欢迎，每个消费者收件箱的邮件数量也大为增加。
Because the company is based on telephone-based sales, marketing phone does not mean that a large number of outgoing calls to random, so it requires a certain degree of skill and strategy.
因为公司是以电话销售为主、电话营销并不等于随机地打出大量电话、所以它需要一定的策略和技巧。
应用推荐