Implementation of CDN depends on various network technologies, of which technology such as caching, dynamical content distribution and duplicating, load-balancing and so on is primary.

CDN的实现需要依赖多种网络技术的支持，其中主要的有缓存技术、动态内容分发与复制技术、负载均衡技术等。

youdao

Power distribution system reconfiguration is one of the major ways to reduce network losses and improve reliability. It also is one of the primary functions of DMS.

配电网重构是配电系统优化运行的主要措施之一，也是配电管理系统（DMS）中的一项主要功能。

youdao

New York City system so that loss of one or two transmission lines or primary distribution feeders may compromise a significant part of the overall network .

FORBES: Brave New World For Big Apple's Power Grid