求翻译：我往往针对不同的客户情况把跟进分成三类，1.是服务性跟进。2.转变性跟进。3.长远性跟进。这篇文章我只讲后两种跟进，因为第一种是已经做成生意的跟进，我会在今后的文章中专门讲。第二种转变性跟进，是指通过预约或者拜访知道通过努力可以达成合作的一种跟进方法。第三种长远性跟进，是指短期内还难以达成合作的跟进方法。是什么意思？

I often for different customers to follow up into three categories, 1. is the follow up service. 2. changes are underway. 3. long-term follow up. This article after I spoke only two follow up, because the first has made a business of follow up, I will specifically say in future posts. Second shift to follow up, refers to efforts by appointment or visit know by a follow up method of cooperation could be reached. Third long-term follow up, is also difficult to reach in the short term follow-up of cooperation method.