合同覆盖了多种网络管理服务，包括网络防御、入侵探测和分析、救援和频谱网络管理。
The contract covers a wide range of network management services, including network defense, intrusion detection and analysis, remedies and spectrum network management.
这个系统通过覆盖全美的地面服务器网络来提供链接。
The system uses a national network of special ground stations to provide connectivity.
Groupon在全球35个国家拥有网络覆盖，超过3300万用户使用它的服务。
Groupon's global network has more than 33 million subscribers in 35 countries.
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