1、insomnia
读音：英[ɪn'sɒmniə]、美[ɪn'sɑːmniə]
意思：n. 失眠；失眠症
举例：Lately he has been moaning about his insomnia and headache.
他近来一直诉说自己患了失眠和头痛症。
2、sleeplessness
读音：英['sliːpləsnəs]、美['sliːpləsnəs]
意思：n. 失眠
举例：Sleeplessness is sure to tell on your health.
失眠肯定会影响你的健康。
反义词：hypersomnia
读音：英['weɪkfl]、美['weɪkfl]
意思：n. [医]睡眠过度；嗜睡
举例：Modafinil is a novel central stimulant for the treatment of narcolepsy and idiopathic hypersomnia.
莫达非尼是一种新型精神兴奋剂，治疗发作性睡眠症及自发性睡眠过度。
baibaicause
