问个关于subscription的翻译，谢谢！

DRM module manages the number of copies that can be viewed and distributed in large volume based subscription and/or single subscriber applications.

in large volume based subscription 开始就看不懂结构和意思了，请高手指教，谢谢！

基于大量协议书和/或者单一协议书签署者的申请
in large volume based = based in large volume 介宾提前了

我觉得似乎应该这么分句：
that can be viewed and distributed in （large volume based subscription） and/or （single subscriber applications）
large volume based subscription应该是：基于大容量的subscription（订阅？），与single subscriber applications（单个订户？应用？）并列，都是in的宾语
应该结合上下文理解，可能会更清楚。subscription到底指什么？

*-based，基于*的
如time-based，基于时间的