Dr Kelley called for staggered start times at schools and workplaces as a result of research into the human body's 24 hour rhythms.

根据他这项24小时人体节奏性的研究结果，凯利博士呼吁学校上课时间和企业上班时间应重新调整。

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The staggered start dates are a result of changes made to the troubled New Orleans Public School System after Katrina.

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Start times are staggered, and runners typically begin arriving at the finish line around noon with the remainder of the field coming in over the next several hours.

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Like the marathon, start times are staggered.

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