所以，这对于打击盗版和提供远程交互式服务是有利的。
This has the benefit of reducing piracy and providing a far more interactive service, because individual video streams are sent to each subscriber.
对于那些时间要求精确到秒的媒体和交互式服务来说，用4 G再合适不过了。
4g will be suitable for media and interactive services for which timing on the second is essential.
这个教程重点讲述了单个服务的设计而不是交互式服务或者协作服务的设计。
This tutorial focuses on the design of individual services, not the design of service interactions or collaborations.
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