单词：nrem 

名词

• 
  [1.n.nrem] (同义词:[orthodox_sleep]  [nonrapid_eye_movement_sleep]  [NREM_sleep]  [nonrapid_eye_movement]  [NREM]  )
• 
  注释列句：a recurring sleep state during which rapid eye movements do not occur and dreaming does not occur; accounts for about 75% of normal sleep time
• 上位词 -> [sleep( vi. 睡, 睡觉 n. 睡眠 )]  [physical_condition(物理［物质］状态 )]  [condition( n. 条件, 情形, 环境, 社会地位 vt. 以...为条件, 使达到要求的情况 )]  [state( n. 情形, 状态, 国家, 政府, 州 adj. 国家的, 国有的, 国营的, 州的, 正式的, 典礼用的 vt. 声明, 陈述, 规定 )]  [attribute( n. 属性, 品质, 特征, 加于, 归结于 )]  [abstraction( n. 提取 )]  [entity( n. 实体 )]