sleeper
noun uk/ˈsliː.pər/ us/ˈsliː.pɚ/
(PERSON)
a good/heavy/light sleeper 睡眠好／睡觉沉／睡觉轻的人
someone who sleeps in the stated way
I'm a light sleeper - the slightest noise wakes me. 我睡觉很轻——最轻微的声响也会吵醒我。
You won't wake him - he's such a heavy sleeper. 你不会吵醒他——他睡觉很沉。
(ON TRAIN)
（列车的）卧铺车厢，卧铺；卧铺列车
acarriage in a train with beds for passengers to sleep in, or one of the beds in this carriage, or the type of train that has these carriages
I'm travelling overnight so I've reserved a sleeper. 我要坐一整晚的车，因此我订了一个卧铺。
The 11.45 to Venice is a sleeper. 11点45分开往格威尼斯的车是一列卧铺车。
(BLOCK)
[ C ] UK (US railroad tie)枕木
one of the heavy horizontal blocks that supports a railway track
(RING)
[ C ] UK（为防止耳洞长死而戴的）小耳环
a small gold or silver ring that is worn in a pierced ear (= one that has a hole in it) to stop the hole from closing while other earrings are not being worn
(SUDDEN ACTIVITY)
[ C ]（长期蛰伏后）一鸣惊人的人；爆冷的人（或物）
a person or thing that is suddenly and surprisingly successful after a long period of not achieving anything
[ C ]潜伏特工
a spy who only becomes active a long time after being put in place by an organization or country
(CLOTHING)
[ C ] US (UK sleepsuit)婴儿全身睡衣
a piece of clothing for a baby that covers the whole body, worn especially at night