添加更多由适合您的组织的RSS 2.0规范提出的通道扩展，或者识别url用于在维护搜索站点时指定信息。
Add more channel extensions honored by RSS 2.0 specifications that suits your organization or identify URLs that specify information when the search site is under maintenance.
这条地下通道可以同一时间维护多达9架潜艇，一起修理和诊断所有的设备。
The underground passage was able to keep up to 9 submarines at a time, together with all the equipment for repairing and diagnostics.
由于它维护对话流、当前状态和公共数据，因此，它很自然地会包含多通道应用程序。
Because it maintains the dialog flow, current state, and public data, it essentially contains the multimodal application.
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