睡意朦胧

deep sleep───[心理]深度睡眠；睡眠的深层状态

steep slope───陡坡，急坡；高倾斜

keep step───（与…）齐步前进；（与…）步调一致；跟上

last sleep───最后一次睡眠

lose sleep───失眠

sleep apnea───睡眠呼吸暂停；睡眠呼吸中止症

sleep away───一直熟睡；用睡觉消磨（时光）；用睡觉消除（头痛等）

Roughly one-third of those surveyed said they had fallen asleep or become very sleepy at work in the past month.───约三分之一的受访者称，在过去一个月中，他们曾在上班时间睡着或感到昏昏欲睡。

All are sleepy--some actually asleep.───所有动物都很困——有些真的睡着了。

's possible to feel "tired" physically and still be unable to fall asleep, because while your body may be exhausted, you don't feel sleepy.───身体上感到“劳累”却仍然无法入睡是可能的，因为你的身体可能感到疲惫，但你不觉得困倦。