wakefulness [ˈwekfəlnɪs]

例句:

• Perhaps senility results from an aging brain's increasing inability to maintain a firm boundary between sleep and wakefulness.
  来自SA
• She began to drift between sleep and wakefulness.
  她开始进入时睡时醒的状态.
  
• It is never a good idea to take sleeping tablets regularly for this kind of wakefulness.
  经常吃安眠药来对付这种失眠绝不是什么好办法。
  
• Old Cheng fell asleep, but Xiangzi tossed and turned in wakefulness.
  老程睡去, 祥子来回的翻腾,始终睡不着.
  
• The evidence that prolonged wakefulness leads to diminished performance is both common-sensical and ironclad.
  来自WSJ
• Many grieving people say they relish the moment between sleep and wakefulness, before their conscious mind remembers their loss.
  来自THETIMES