词典释义：
a person or animal who is asleep
睡着的人或动物。
[with adj.]a person with a specified sleep pattern
（以特定方式）睡觉的人
-
he was a light sleeper, for long periods an insomniac .他睡眠不好，长时期失眠。
a thing used for or connected with sleeping, in particular
与睡觉有关的东西，尤指：
a train carrying sleeping cars
卧铺火车：
一节卧铺车厢。
a berth in a sleeping car
卧铺。
〈非正式〉 安眠药。
(一般作
〈主北美〉 婴儿（或小孩）的睡袍。
〈北美〉 沙发床。
a film, book, play, etc. that achieves sudden unexpected success after initially attracting very little attention, typically one that proves popular without much promotion or expenditure
爆冷门的电影（或书、剧等）。
an antique whose true value goes unrecognized for some time
（一段时间内真实价值不为人所知的）沉睡古董。
(亦作
潜伏特工。
〈英〉 （保持耳环孔不闭合的）小耳环，杆子。
〈主英〉 （铁路）枕木。
a stocky fish with mottled coloration which occurs widely in warm seas and fresh water
睡鱼。
