These estimates are intended to provide an average over the duration of the pandemic in the absence of a work site-specific pandemic influenza plan.

而这里的估算，只对整个流感爆发期间采用了一个平均的消耗量，还缺少针对每个具体作业点的流感应对计划。

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Methods: the absence of the righting reflex was considered as the sleep onset and the duration of the loss of the righting reflex was recorded as the sleeping time.

方法：以翻正反射消失为睡眠开始的指标，至翻正反射恢复作为睡眠时间。

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Methods: the absence of the righting reflex was considered as the sleep onset and the duration of the loss of the righting reflex was recorded as the sleeping time.

方法：以翻正反射消失为睡眠开始的指标，至翻正反射恢复作为睡眠时间。

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