A multilevel real-time database system must have security constrains in addition to timing constrains.
一个多级安全实时数据库系统不仅需要有安全限制，同时也要有时间约束。
Constrains on the new system such as timing, financial, staffing constrains should be identified.
对新系统的种种规定，如时间安排、经费、和人员的规定都应明确。
Constrains on the new system such as timing, financial, staffing constrains should be identified.
对新系统的种种规定，如时间安排、经费、和人员的规定都应明确。
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