They can just be symptoms of a sleepdisorder that can result from an unpleasant experience, stress, or certain drugs.
它们可能只是睡眠障碍的症状,可能是由不愉快的经历、压力或某些药物引起的。
2
Insomnia can be a symptom of a sleepdisorder or other health problems.
失眠可以是睡眠紊乱或其他健康问题的征兆。
3
If there is excessive daytime sleepiness and desire to nap, in spite of adequate sleep time, this might suggest a sleep disorder warranting further evaluation.