它将取代现有的第二代航天器，第二代能够每15分钟更新一次欧洲天气系统的状态。
It will replace the current Second Generation spacecraft that return 15-minute updates on the state of weather systems over Europe.
这项服务依托于第三代移动网络系统(3 G)，而不局限于速度较慢的第二代移动网络系统。
It works with fast third-generation (3g) mobile networks, not just slower 2g ones.
区域供冷系统与燃气分布式能源系统是第二代能源供应系统的代表。
The regional cooling system and gas distributed energy system are representative of second generation energy supply system.
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