Bocconi的admission letter里面说“a visa issued for study purposes is compulsory for your final enrollment at the University in Italy”,是说在确认ad交占位费之前就要弄到学生签证吗?但是意大利领事馆的网站上说申请签证要求有Pre-enrollment,我也不确定这个是什么。所以到底是该怎么处理签证呢,有没有大神来解释一下这两个是怎么一回事?我猜是应该在提交enrollment application之后才开始申请签证,不知道是不是这样?