duty period

基本解釋

Duty period, highlighting prevention, and strengthen all aspects of troubleshooting, truly, does not produce unsafe.
值班期間，突出預防為主，加強對各個環(huán)節(jié)的隱患排查，切實做到不安全不生產(chǎn)。
www.qy7788.com.cn
Every crossing has the fixed duty period , charges centre for being able to change it's period and in depending on a road when being crowded;
各路口有固定的工作周期，并且在道路擁擠時中控中心能改變其周期；
Ship-owner: But, how does he perform the duty in the transitional period?
船東：但，如何讓他在過渡期內(nèi)完成工作？
blog.sina.com.cn

You know, you come on active duty for a certain period, but you also sign up for a contractual period if you're an enlisted Marine.
NPR: Marine Recall Prompts Questions over Iraq Stress
So you do a certain period on active duty, perhaps two years.
NPR: Marine Recall Prompts Questions over Iraq Stress
If you have a vision for your business, then it is your duty to bring it to fruition — period.
FORBES: How To Ask For What You Want -- And Get It All