Each network administrator, system administrator, and program manager should be responsible for the security of the system itself.
每个网络管理员、系统管理员和程序管理员应对自身系统的安全负责。
Because of some reasons, the network manager can seldom apply a full security test of his system in time.
网络管理人员由于种种原因，很难及时、全面地测试系统的安全性。
Different roles can only manage work lists correlating with themselves after they land the work list manager. This improves the security of the system.
不同的角色登录工作列表管理器以后，只能管理和本角色相关的工作列表，提高了系统的安全性。
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