The moms tell of sleeping in bursts, a phenomenon the researchers refer to as “sleep fragmentation.”
这些妈妈说她们睡一会儿就会突然醒来，研究者们把这种现象称为“断裂性睡眠”。
The authors defined sleep fragmentation using an index of the number of sleep stage transitions per hour of sleep.
调查者使用每小时睡眠中睡眠时相变换的次数作为定义易醒的指标。
The authors defined sleep fragmentation using an index of the number of sleep stage transitions per hour of sleep.
调查者使用每小时睡眠中睡眠时相变换的次数作为定义易醒的指标。
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