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失眠也叫睡不着。它是指难以入睡或者难以保持睡眠状态。偶尔的失眠是正常现象,不用在意。经常性的失眠会严重影响工作和学习,就需要去看医生。
Insomnia also called sleepless. It means hard to sleep or difficult to keep sleeping. Occasional insomnia is normal, do not mind. Regular insomnia will seriously affect work and study, you need to see a doctor.