段勤（？—359年），中国十六国时期兵变首领之一。鲜卑人，属于段部鲜卑一系，是段部鲜卑首领、辽西公段末波之子。
危险时段勤务监控制度 Dangerous times r duty system
执勤时段 Flight duty period
缺勤分段 absence split
后勤阶段 logisitic phase
出通勤时段堵车最糟的 the worst congestion
段克勤 Ke-Qin Duan
2000年，“德勤全球”再次被任命为该项目第二阶段的顾问。
In 2000, Deloitte was reappointed as consultants for the second phase of the project.
相持段发挥很不稳定，得分率在胜负场差别巨大。2王励勤发球落点比较单一，主要以台内中路为主。
Stalemate segment plays a very unstable, scoring in a huge difference between win and lose game. 2 Wang Liqin's Serve placement is relatively simple, mainly on tables, mainly within the centre.
通过研究分析，得出如下结论：1王励勤发抢段得分率较高，但使用率比较低。
Through research and analysis, draw the following conclusions:1 Wang Liqin's serve and attack at a higher scoring percentage, but the usage is relatively low.
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