Hackers are common illegal intruders in network systems.
黑客是网络系统常见的非法入侵者。
Computer network systems have become an intelligent building one of the important facilities.
计算机网络系统已成为智能建筑的重要设施之一。
Computer network systems have become an intelligent building one of the important facilities.
计算机网络系统已成为智能建筑的重要设施之一。
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