Whatever you call it, it's common. In a 2017 survey by the noNPRofit National Sleep Foundation, 45 percent of adults said they had been affected by poor sleep or not enough sleep in the previous week.
不管你叫这种症状什么,这都很常见。非盈利机构美国国家睡眠基金会2017年的一项调查显示,45%的成年人说他们在前一周因睡眠质量不好或者睡眠时间不够受到影响。
As many as 20 percent of people report excessive sleepiness on a regular basis. And, a National Safety Council survey reported in 2017 that 76 percent of people felt tired at work.
高达20%的人经常过度困倦。另外,美国国家安全委员会2017年的一项调查显示,76%的人在工作时感到疲倦。
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