##Vigilantly monitoring security
一：正文
The system administrator must implement a security policy and periodically check to be sure that the security of the system has not been violated. On low-security systems, this chore might involve only a few basic checks for unauthorized access. On a high-security system , it can include an elaborate network of traps and auditing programs.
二：單詞
*：vigilantly ['vɪdʒɪləntlɪ] 警覺地
*： implement [ˈɪmplɪment] 實施
*：periodically [ˌpɪərɪ’ɒdɪklɪ] 定期的
*：violated 侵犯
*：involve [ɪnˈvɒlv] 圍繞
*:unauthorized /,ʌn’ɔ:θəraizd/ 未被授權的
*：elaborate /ɪ’læb(ə)rət/ 詳盡的
*：traps /træps/ 圈套
*：auditing /'ɔːdɪtɪŋ 　/ 審計
三：全文
系統管理員必須實施某種策略，並且做定期檢查，確保系統安全沒有受到侵害。在安全要求低的系統上，這些工作可能對非授權訪問進行檢查。要求高的的系統上，可能包括仔細布置由陷阱和設計程式構建的監事網。