They found that the students who had a nap did better in a test of cognitive function than their napless counterparts.

他们发现，在认知功能中，睡午觉学生的果好于没睡午觉的。

Even naps are beneficial, according to a Harvard study in which subjects who took a 90-minute snooze after learning a task performed 50 percent better over a 24-hour period than the napless group.

根据哈大学的一项研究表明，即便盹也会对记忆有帮助。受者学习后盹90分钟的人们在24小时内要比那些没有盹的人群表现更好。