2. Defended system includes management center, firewall, pseudo server and data
gatherer.
该防御体系包括管理中心、防火墙、伪服务器、数据收集器等。
3. In most places, writing started about the same time ancient civilizations emerged from hunter-
gatherer communities.
大多数地方的写作都在大概相同的时间,从打猎-采集的社会中开始出现。