由于更改不会立即在内容交付网络中反映出来，文件的影子副本往往会持续几天或几周。
Because changes aren't reflected across the content delivery networks immediately, ghost copies of files tend to linger for days or weeks.
XG2600交换机设计用于低延迟的应用，如存储、数字视频、大学研究、网络托管和内容交付网络等。
The XG2600 is designed for low latency applications, such as storage, digital video, university research, Web hosting and content delivery networks.
用户能够通过IP网络交付包含富文本、图像、音频、视频或这些内容的组合的消息。
Users are able to deliver the messages containing rich text, images, audio, video, or the combination of these over an IP network.
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